Joylog vs Erchang Fish
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Joylog
This app uses a smart sonar system to detect fish location, size, and depth up to 40 meters underwater. It also provides real-time information on underwater topography, water depth, and temperature, displayed on your mobile device.
- High-precision miniature sonar system
- Detects fish location, size, and depth
- Underwater topographic map generation
- Real-time water depth and temperature
- Mobile app integration for live data
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JOYLOG智能声呐探鱼器集成高精度微型声呐系统，可探测水下40m范围内鱼群位置，大小，深度等水下鱼情，以及水底地形图，水深，水温等信息，通过JOYLOG APP让您在手机上实时掌握水下动态。 JOYLOG smart sonar fish finder integrates high-precision miniature sonar system which can detect the location, size, depth and other underwater fish feelings within the range of 40m underwater, as well as underwater topographic map, water depth, water temperature and other information. JOYLOG APP enables you to grasp the underwater dynamics in real time on your mobile phone.
Erchang Fish
This intelligent fish detector app offers a dual-band sonar system with a user-friendly interface. It's designed to be a helpful tool for fishing enthusiasts, providing convenient operation for better angling experiences.
- Dual band intelligent fish detection
- Friendly interface
- Convenient operation
- Fishing helper tool
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This is a dual band intelligent fish detector app with friendly interface and convenient operation. It is a good helper for fishing lovers.
Screenshots
Verdict
The clearest difference is review sentiment: Joylog at 100% against Erchang Fish's 33%. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Joylog ships an update every 4 months, Erchang Fish every 7 months. The most recent releases landed on June 1, 2026 and September 10, 2026 respectively.
| Parameter | Joylog | Erchang Fish |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 5 — better | — |
| Update frequency | Every 4 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 | 9.3 — better |
| Further details — not scored | ||
| Size | 14 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Joylog Tech Co.,Ltd | 定敢 刘 |
Customer experience
Joylog
Erchang Fish
In-app purchases
Joylog
No in-app purchases
Erchang Fish
No in-app purchases
