6 Best Alternatives to the Phiradar JOYWEE FF688C 3.5" Phiradar (2026)
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The Phiradar JOYWEE FF688C 3.5" Phiradar offers a sunlight-readable 3.5-inch screen and dual-frequency sonar for detecting depth and bottom contours. You might consider phiradar joywee ff688c 3 5 phiradar alternatives if you need GPS mapping, a larger display, or a wireless transducer. This unit is compact at 6.3 inches wide and weighs just over two pounds, making it easy to mount on small boats. However, its button controls lack waterproofing, and the fixed mount may not suit kayak anglers seeking portability.
The alternatives on this list were chosen because their specifications overlap with the original. Some models include CHIRP sonar for clearer target separation, while others provide built-in GPS for tracking your route. You may prefer a 5-inch or 9-inch screen for better visibility in bright conditions. Others offer wireless connectivity for easier installation on kayaks. Each option maintains core fish-finding functions while addressing specific limitations of the Phiradar design.
Our top pick: Phiradar 3.5-Inch Dual-Beam Boat Fish Finder.
How each alternative compares
Garmin Striker 4 GPS Fish Finder with Transducer
The Garmin Striker 4 replaces the Phiradar’s dual-beam sonar with CHIRP technology, providing clearer target separation and better fish identification. It adds built-in GPS for tracking your routes, a feature the Phiradar lacks entirely. The screen size is similar at 3.5 inches, but the Garmin is significantly lighter at 8 ounces versus 2.03 pounds. You give up the Phiradar’s specific dual-frequency options, but gain reliable mapping and simpler operation. This unit suits small boats and ice fishing where weight and GPS data matter more than broad sonar coverage.
LUCKY Wireless Portable Fish Finder 3.5"
The LUCKY Wireless Portable Fish Finder differs fundamentally by using a castable transducer instead of a fixed mount. It weighs 1.54 pounds and offers wireless freedom, unlike the Phiradar’s button-controlled, boat-mounted design. You trade the Phiradar’s 240-foot depth range and sunlight-readable screen for portability and ease of setup. This option is ideal for kayak anglers who need lightweight gear they can move between water bodies. It sacrifices the detailed bottom contour and temperature reading of the Phiradar for a simple, cast-and-go sonar experience.
Garmin Striker 4 CHIRP Fishfinder with Cover
The Garmin Striker 4 CHIRP Fishfinder with Cover uses CHIRP sonar for improved clarity compared to the Phiradar’s traditional dual-beam setup. It includes built-in GPS for navigation, which the Phiradar does not offer. The unit is slightly heavier at 2.47 pounds than the Phiradar’s 2.03 pounds, but maintains a compact 3.5-inch display. You gain a protective cover and more reliable sonar performance. This model is best for small kayak setups where GPS tracking and sonar precision are prioritized over the Phiradar’s multi-language menu and specific depth alarm features.
Garmin Striker Vivid 5cv 5-Inch Fishfinder
The Garmin Striker Vivid 5cv offers a 5-inch display, which is larger than the Phiradar’s 3.5-inch screen. This provides better visibility for anglers who need a clearer view of sonar data. The Garmin is heavier at 3.8 pounds compared to the Phiradar’s 2.03 pounds, requiring more mounting space. You gain a larger screen and potentially better sonar imaging, but lose the compact footprint and lightweight design of the Phiradar. This unit is suitable for those who prioritize screen size and clarity over portability and the Phiradar’s specific dual-frequency sonar capabilities.
Garmin Striker Vivid Fishfinder with Wi-Fi
The Garmin Striker Vivid 9sv features a 9-inch display, significantly larger than the Phiradar’s 3.5-inch screen. It includes built-in mapping, a feature absent in the Phiradar. The unit weighs 6.44 pounds, making it much heavier and bulkier than the Phiradar’s 2.03 pounds. You trade the Phiradar’s simplicity and compact size for advanced charting and superior visibility. This model is intended for serious anglers who need large screens and detailed mapping, rather than the straightforward depth and bottom contour detection provided by the Phiradar.
Lowrance Eagle 5 SplitShot HD Fish Finder
The Lowrance Eagle 5 SplitShot HD Fish Finder provides a 5-inch display, larger than the Phiradar’s 3.5-inch screen. It weighs only 1 pound, making it lighter than the Phiradar’s 2.03 pounds. The unit offers clear sonar and charting capabilities, balancing visibility with portability. You gain a larger screen and potentially better structure detection, but lose the Phiradar’s specific dual-frequency sonar options. This model is ideal for small boats needing clear sonar and regional mapping, offering a middle ground between the Phiradar’s simplicity and larger Garmin units.
Quick picks
Our 7 picks
Phiradar 3.5-Inch Dual-Beam Boat Fish Finder
Best for: simple boat fishing under 240 feet
- Display Size
- 3.5" 18bit TFT V320XH240
- Sonar Type
- 200KHz/83KHz dual beam
- Mount Type
- Boat
- Max Depth
- 2 to 240 ft (0.6-80m)
- Control
- Buttons
- Water Type
- Sea, river, lake
View on Amazon: Phiradar 3.5-Inch Dual-Beam Boat Fish Finder Affiliate link
The Phiradar JOYWEE FF688C is a 3.5-inch color LCD fish finder designed for boats. It features dual sonar frequencies of 200KHz and 83KHz, allowing you to detect fish in seas, rivers, and lakes. The device reads depths from 2 to 240 feet with 1/10th precision. It includes a sunlight-readable display, bottom contour tracking, and water temperature indicators. This unit suits anglers who need reliable depth and structure data without complex controls.
Pros
- 3.5-inch 18bit TFT sunlight-readable display
- Dual 200KHz and 83KHz sonar frequencies
- Depth range up to 240 feet (80m)
- Tracks bottom contour and water temperature
- 100 levels of sensitivity settings
Cons
- Buttons are not waterproof
- Smaller 3.5-inch screen compared to 5-inch competitors
- Limited to 240 feet maximum depth
Good fit if
- You need a simple, button-controlled fish finder
- You fish in shallow to medium waters under 240 feet
- You want dual-frequency sonar for varied conditions
Skip if
- You require a waterproof keypad interface
- You prefer a larger 5-inch color display
- You fish in deep waters exceeding 240 feet
Verdict: Phiradar JOYWEE FF688C 3.5" Fish Finder offers clear dual-frequency sonar and a sunlight-readable screen for anglers who prioritize depth precision and simplicity over large displays.
Garmin Striker 4 GPS Fish Finder with Transducer
Best for: small boats and ice fishing
- Display Size
- 3.5 inches diagonal
- Sonar Type
- CHIRP, ClearVü scanning
- GPS
- Waypoint map
- Mount Type
- Keyed interface, built-in flasher
- Max Depth
- 1,600 ft freshwater, 750 ft saltwater
- Control
- Keyed interface with dedicated buttons
View on Amazon: Garmin Striker 4 GPS Fish Finder with Transducer Affiliate link
The Garmin Striker 4 is a 3.5-inch GPS fishfinder with CHIRP and ClearVü sonar. It features a keyed interface for simple operation and includes a built-in flasher mode. The unit supports freshwater and saltwater use up to 1,600 feet. Its compact 8-ounce design fits small boats and kayaks well. You get waypoint mapping and detailed underwater imaging.
Pros
- CHIRP sonar for crisp fish arches
- ClearVü scanning sonar for detailed images
- Built-in flasher mode for ice fishing
- GPS waypoint mapping included
- IPX7 water rating
Cons
- Smaller 3.5-inch display limits visibility
- Keyed interface lacks touch controls
- No Wi-Fi or Bluetooth connectivity
Good fit if
- You want simple, dedicated button controls
- You need GPS waypoint mapping
- You fish in ice or vertical jigging
Skip if
- You prefer large touch screens
- You need wireless smartphone connectivity
- You require advanced mapping features
Verdict: Garmin Striker 4 3.5" GPS Fishfinder is a practical choice for anglers who prioritize sonar clarity and GPS tracking over screen size. It fits small craft where simplicity and reliability matter more than high-tech interfaces.
LUCKY Wireless Portable Fish Finder 3.5"
Best for: Kayak anglers seeking lightweight portable sonar
- Display Size
- 3.5 inches
- Sonar Type
- Wireless sonar, 90° beam
- Transducer
- Wireless floating sonar sensor
- Mount Type
- Handheld, castable, portable
- Connectivity
- Wireless, 853 ft operation distance
- Max Depth
- 3 ft to 147 ft
View on Amazon: LUCKY Wireless Portable Fish Finder 3.5" Affiliate link
The LUCKY portable fish finder uses a wireless sensor and handheld display to map depths up to 147 feet. Its 3.5-inch horizontal LCD shows fish icons and depth data. The unit weighs 1.54 pounds and connects up to 853 feet away. It suits kayak anglers who want a lightweight, castable sonar system without drilling holes or mounting brackets.
Pros
- Wireless sensor with 853-foot operation range
- 3.5-inch horizontal LCD display with scroll history
- Detects fish depth and location within 3 to 147 feet
- Lightweight 1.54-pound design for easy portability
- Floating sensor casts like a bobber
Cons
- Fixed 90-degree beam width limits side scanning
- Handheld display requires manual carrying
- No GPS or mapping integration
Good fit if
- You want a lightweight sonar system for kayak fishing
- You prefer a castable sensor over fixed mounts
- You need a portable unit for shore or ice fishing
Skip if
- You require a large color screen for detailed mapping
- You need built-in GPS for navigation tracking
- You want a permanently mounted transducer for stability
Verdict: LUCKY Portable Wireless Fish Finder offers a lightweight, castable sonar solution for anglers prioritizing portability over fixed mounting. It fits kayak users who value easy setup and wireless freedom.
Garmin Striker 4 CHIRP Fishfinder with Cover
Best for: small kayak setups needing GPS
- Display Size
- 3.5"
- Sonar Type
- CHIRP
- GPS
- GPS
- Dimensions
- 3.6 × 1.6 × 5.9 inches
- Weight
- 2.47 pounds
View on Amazon: Garmin Striker 4 CHIRP Fishfinder with Cover Affiliate link
The Garmin Striker 4 is a 3.5-inch color fishfinder with built-in GPS and CHIRP sonar. It measures 3.6 inches long, 1.6 inches wide, and weighs 2.47 pounds. This compact unit provides clear imaging for kayak anglers who need reliable navigation and fish detection without a large footprint. The included protective cover adds durability for field use.
Pros
- CHIRP sonar for improved target separation
- Built-in GPS for mapping
- 3.5-inch color display
- Compact 2.47-pound weight
Cons
- Smaller 3.5-inch screen limits visibility
- No sonar imaging modes like SideScan
- No built-in Wi-Fi for app connectivity
Good fit if
- You need a compact unit for small kayaks
- You want reliable GPS mapping
- You prefer CHIRP sonar clarity
Skip if
- You require a 5-inch display
- You need SideScan imaging
- You want wireless app connectivity
Verdict: Garmin Striker 4 3.5" GPS Chirp Fishfinder fits kayak anglers who prioritize a small footprint and reliable GPS mapping over large screens or advanced imaging.
Garmin Striker Vivid 5cv 5-Inch Fishfinder
Best for: Anglers needing larger screen visibility
- Display Size
- 5 Inch
- Sonar Type
- Vivid scanning sonar
- Dimensions
- 11.4 × 8.2 × 6.6 inches
- Weight
- 3.8 pounds
View on Amazon: Garmin Striker Vivid 5cv 5-Inch Fishfinder Affiliate link
The Garmin Striker Vivid 5cv features a 5-inch color display and vivid scanning sonar. It measures 11.4 inches long and weighs 3.8 pounds. The unit includes a transducer for clear underwater imaging. This size suits anglers who want a larger screen for better visibility. It is a practical option for kayak or small boat fishing where screen clarity matters.
Pros
- 5-inch color display for improved visibility
- Vivid scanning sonar technology
- Includes transducer for immediate use
- Compact 3.8-pound weight
Cons
- Larger 5-inch screen may not fit small consoles
- Heavier than basic 3.5-inch models
- No built-in GPS mentioned in specifications
Good fit if
- You need a larger screen for better readability
- You prefer vivid scanning sonar clarity
- You have space for a 5-inch unit
Skip if
- You require a compact 3.5-inch display
- You need built-in GPS mapping
- You prioritize ultra-lightweight gear under 3 pounds
Verdict: The Garmin Striker Vivid 5cv 5-inch Fishfinder fits anglers who prioritize screen size and sonar clarity over compactness. It is a solid choice for those with adequate mounting space.
Garmin Striker Vivid Fishfinder with Wi-Fi
Best for: Anglers needing large screens and built-in mapping
- Display Size
- 9"
- GPS
- High-sensitivity GPS
- Mapping
- Built-in Quickdraw Contours
- Connectivity
- Wi-Fi, ActiveCaptain app
- Color
- Black
- Dimensions
- 4.4 × 7.8 × 9 inches
View on Amazon: Garmin Striker Vivid Fishfinder with Wi-Fi Affiliate link
The Garmin Striker Vivid 9sv features a 9-inch color display with vivid scanning sonar palettes. It includes high-sensitivity GPS for marking waypoints and built-in Quickdraw Contours mapping for custom charts. Wi-Fi connectivity links to the ActiveCaptain app for data transfer. This unit suits anglers who want large-screen visibility and detailed mapping without external devices. It is a robust choice for larger boats or kayaks where screen real estate matters.
Pros
- 9-inch color display for clear visibility
- Built-in Quickdraw Contours mapping
- High-sensitivity GPS for speed and waypoints
- Wi-Fi connectivity to ActiveCaptain app
Cons
- 9-inch size is bulky for small kayaks
- Heavy at 6.44 pounds
- Requires compatible transducer for SideVü scanning
Good fit if
- You need a large screen for clear reading
- You want built-in mapping without extra gear
- You prefer Wi-Fi app connectivity
Skip if
- You have limited mounting space on a kayak
- You need a lightweight unit under 5 pounds
- You only require basic sonar without mapping
Verdict: Garmin Striker Vivid 9sv 9-inch Fishfinder delivers a large screen and built-in mapping for serious anglers. It fits those who prioritize visibility and charting over compact size.
Lowrance Eagle 5 SplitShot HD Fish Finder
Best for: Small boats needing clear sonar and charts
- Display Size
- 5"
- Sonar Type
- CHIRP, DownScan
- Transducer
- SplitShot HD
- Mapping
- C-MAP DISCOVER
- Color
- Black
- Dimensions
- 7.17 × 4.35 × 5.03 inches
View on Amazon: Lowrance Eagle 5 SplitShot HD Fish Finder Affiliate link
This Lowrance fish finder features a 5-inch IPS display and includes a SplitShot HD transducer. It combines CHIRP sonar with DownScan Imaging to help you identify fish and structure. The unit comes with a C-MAP Discover microSD card for inland and coastal mapping across the U.S. and Canada. It weighs 1 pound and measures 7.17 inches long. This compact device suits anglers who need reliable charting and clear sonar views in a small package.
Pros
- 5-inch IPS display for clear viewing
- Includes SplitShot HD transducer with CHIRP and DownScan
- C-MAP Discover microSD card for U.S. and Canada charts
- Compact 1-pound build for space-conscious boats
Cons
- Smaller 5-inch screen compared to 7-inch or 9-inch alternatives
- Requires microSD card for chart data rather than built-in memory
- No GPS navigation capabilities listed in specifications
Good fit if
- You need a compact unit for small boats or kayaks
- You want detailed bottom structure views with DownScan Imaging
- You fish in U.S. and Canadian inland or coastal waters
Skip if
- You require a screen larger than 5 inches
- You need built-in GPS navigation without external cards
- You prefer a smaller 4-inch display for minimal footprint
Verdict: Lowrance Eagle 5 SplitShot HD offers a balanced mix of sonar clarity and charting for small watercraft. It fits anglers who prioritize structure detection and regional mapping over large screens.
Specifications side by side
| Spec | Phiradar 3.5-Inch Dual-Beam Boat Fish Finder | Garmin Striker 4 GPS Fish Finder with Transducer | LUCKY Wireless Portable Fish Finder 3.5" | Garmin Striker 4 CHIRP Fishfinder with Cover | Garmin Striker Vivid 5cv 5-Inch Fishfinder | Garmin Striker Vivid Fishfinder with Wi-Fi | Lowrance Eagle 5 SplitShot HD Fish Finder |
|---|---|---|---|---|---|---|---|
| Display Size | 3.5" 18bit TFT V320XH240 | 3.5 inches diagonal | 3.5 inches | 3.5" | 5 Inch | 9" | 5" |
| Sonar Type | 200KHz/83KHz dual beam | CHIRP, ClearVü scanning | Wireless sonar, 90° beam | CHIRP | Vivid scanning sonar | not specified | CHIRP, DownScan |
| Transducer | not specified | not specified | Wireless floating sonar sensor | not specified | not specified | not specified | SplitShot HD |
| GPS | not specified | Waypoint map | not specified | GPS | not specified | High-sensitivity GPS | not specified |
| Mapping | not specified | not specified | not specified | not specified | not specified | Built-in Quickdraw Contours | C-MAP DISCOVER |
| Mount Type | Boat | Keyed interface, built-in flasher | Handheld, castable, portable | not specified | not specified | not specified | not specified |
| Connectivity | not specified | not specified | Wireless, 853 ft operation distance | not specified | not specified | Wi-Fi, ActiveCaptain app | not specified |
| Max Depth | 2 to 240 ft (0.6-80m) | 1,600 ft freshwater, 750 ft saltwater | 3 ft to 147 ft | not specified | not specified | not specified | not specified |
| Control | Buttons | Keyed interface with dedicated buttons | Handheld display | not specified | not specified | not specified | not specified |
| Water Type | Sea, river, lake | Freshwater, saltwater, ice fishing | Shore, kayak, canoe, boat, ice fishing | not specified | not specified | not specified | not specified |
| Use | Boats | not specified | Fishing, Boats, Travel | not specified | not specified | not specified | not specified |
| Capacity | not specified | Single | not specified | not specified | not specified | not specified | not specified |
| Color | not specified | Black | not specified | not specified | not specified | Black | Black |
| Dimensions | 6.3 × 6.3 × 6.3 inches | 3.6 × 1.6 × 5.9 inches | not specified | 3.6 × 1.6 × 5.9 inches | 11.4 × 8.2 × 6.6 inches | 4.4 × 7.8 × 9 inches | 7.17 × 4.35 × 5.03 inches |
| Weight | 2.03 pounds | 8 ounces | 1.54 pounds | 2.47 pounds | 3.8 pounds | 6.44 pounds | 1 pounds |
| Model | FF688C | 010-01550-00 | not specified | E1GRSTRIKER4DB | not specified | 010-02554-00 | 000-16226-001 |
| Size | not specified | 3.5 | not specified | not specified | 5 Inch | 9 Inch | 5 Inch |
Frequently asked questions
Does the Garmin Striker 4 have GPS?
Yes, the Garmin Striker 4 includes built-in GPS. This allows you to track your routes and mark waypoints while fishing. The Phiradar JOYWEE FF688C lacks this navigation feature entirely. The Striker 4 is a practical choice for small boats where simplicity and reliability matter more than high-tech interfaces.
Is there a wireless fish finder option?
The LUCKY Wireless Portable Fish Finder offers a lightweight, castable sonar solution. It uses a portable kit transducer rather than a fixed mount. This fits kayak users who value easy setup and wireless freedom over stationary units. It weighs 1.54 pounds, making it highly portable for travel.
Which alternative has the largest screen?
The Garmin Striker Vivid 9sv features a 9-inch display. It delivers large screen visibility and built-in mapping for serious anglers. This model fits those who prioritize charting and clarity over compact size. It weighs 6.44 pounds and measures 9 inches in height.
What sonar technology do the Garmin Striker models use?
The Garmin Striker 4 and Striker 4 CHIRP models use CHIRP sonar. This technology provides clearer target separation and better fish identification than dual-beam sonar. The Phiradar JOYWEE FF688C uses dual-frequency sonar. CHIRP is ideal for anglers prioritizing sonar clarity in small craft.
Is there a fish finder with SplitShot HD?
The Lowrance Eagle 5 SplitShot HD offers clear sonar and charting for small watercraft. It balances structure detection with regional mapping. The unit weighs 1 pound and features a 5-inch display. It fits anglers who need detailed bottom contours without requiring a large screen footprint.
Which model is best for kayak anglers needing GPS?
The Garmin Striker 4 CHIRP Fishfinder fits kayak setups needing GPS. It prioritizes a small footprint and reliable mapping over large screens. The unit weighs 2.47 pounds. It is a solid choice for anglers who need navigation data in a compact form factor.
Does the Phiradar 3.5-inch model come with a transducer?
The data lists the Phiradar 3.5-Inch Dual-Beam Boat Fish Finder with specific dimensions. It is designed for simple boat fishing under 240 feet. The unit weighs 2.03 pounds. It offers clear dual-frequency sonar and a sunlight-readable screen for anglers who prioritize depth precision.