Comparison

GDFF vs FishYZMEi

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

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.

Highlights

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

Features

Read 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。

About

FishYZMEi

Features

Read full description

Fish YZMEi APP是深圳市悦之美技术有限公司推出的一款探鱼器APP,采用Wi-Fi无线传输，可抛杆，可固定在船上，无线传输天线可更换，声纳则采用目前最强的Sonar Chirp技术，支持3组不同频率，并且每组频率采用变频技术，可以大大提高探测距离，探测分辨率，抗干扰等。

Screenshots

GDFF3 screens

FishYZMEi4 screens

Verdict

The call

The clearest difference is iOS requirement: GDFF at 10.0 against FishYZMEi's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.

Scorecard1 real difference · 7 level

GDFF versus FishYZMEi: the parameters behind the verdict, then further details
Parameter	GDFF	FishYZMEi
Price	Free	Free
Positive reviews	0.0% of reviews	—
Update frequency	Every 3 weeks	Every 3 weeks
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	10.0 — better	15.6
Further details — not scored
Size	41 MB	36 MB
Age rating	4+	4+
Developer	松林赵	Shenzhen Yuezhimei Technology Co., Ltd

In-app purchases

None

GDFF

No in-app purchases

None

FishYZMEi

No in-app purchases

Questions

Is GDFF free?

GDFF is free to download, with no in-app purchases.

Is FishYZMEi free?

FishYZMEi is free to download, with no in-app purchases.

Do GDFF or FishYZMEi have ads?

Neither GDFF nor FishYZMEi shows ads.

Which is updated more often, GDFF or FishYZMEi?

GDFF ships an update every 3 weeks, and FishYZMEi every 3 weeks. Most recently, GDFF was updated on October 7, 2026 and FishYZMEi on October 12, 2026.