GDFF vs Navison
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GDFF
This professional-grade sonar device connects to your smartphone to provide real-time underwater data. It maps depth, temperature, terrain, and fish density up to 500 meters away and 40 meters deep.
- Real-time sonar technology
- Underwater mapping (depth, temp, terrain)
- Fish density and size detection
- 500m signal range
- 40m maximum depth
- Adjustable gain and multiple modes
Read full descriptionHide full description
革钓WIFI智能探鱼器是一款专业级别的打窝船专用探鱼器，它利用最先进的声呐技术，可以实时监测船所航行位置的水深水温，地形地貌，鱼群密度和鱼群大小等信息并回传到手机上。信号有效距离达到500米，最大深度40米，100级增益调节，多种模式选择，不放过水下隐藏的每个细节，帮助广大钓友探索未知的水下世界。
Navison
Read full descriptionHide full description
Navison is a system launched by BearCreeks GmbH, which combines sonar fish finder, GPS navigation and smart bait boat functions in one app. With the system installed in a bait boat, your boat will be equipped with the GPS, compass, gyroscope, sonar and other sensors. Bait boat can be connected to the Navison app which supports map display, detects route planning, enables setting of the fishing spots, releases baits and hooks, alarms when the voltage of boat´s battery is low and performs some other functions. Bait boat can thus be controlled with this app, allowing you to operate the boat easily with integrated joysticks and get full information about the status of the bait boat as well as the fishing site. Sonar system can also locate fish in your fishing spot, detect its size, show the bottom surface on your screen. Additionally, the system can detect depth, temperature and weather conditions. The app supports 23 different languages.More information about the app and Navison system available soon at www.bearcreeks.com
Screenshots
Verdict
GDFF and Navison are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
GDFF ships an update every 3 weeks, Navison every 2 weeks. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.
| Parameter | GDFF | Navison |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 | 10.0 |
| Further details — not scored | ||
| Size | 41 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | 松林 赵 | BearCreeks GmbH |
In-app purchases
GDFF
No in-app purchases
Navison
No in-app purchases
