# Luckysmart Sonar vs Erchang Fish

The clearest difference is update cadence: Erchang Fish at every 7 months against Luckysmart Sonar's every 15 months. Erchang Fish also leads on iOS requirement (9.3 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Luckysmart Sonar ships an update every 15 months, Erchang Fish every 7 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Luckysmart Sonar | Erchang Fish |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 7 months** |
| Monetization | — | Free |
| Size | 51 MB | 68 MB |
| Requires iOS | 13.0 | **9.3** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [天喜 胡](https://appshunter.io/developer/1535746096) | [定敢 刘](https://appshunter.io/developer/1194376703) |

## What reviewers say

### Luckysmart Sonar

[App page](https://appshunter.io/ios/app/luckysmart-sonar/id1564200878)

**Features:** macOS Compatibility

**In-app purchases:** none


### Erchang Fish

[App page](https://appshunter.io/ios/app/erchang-fish/id1605890664)

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.

**Highlights:** Dual band intelligent fish detection, Friendly interface, Convenient operation, Fishing helper tool

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Luckysmart Sonar free?

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

### Is Erchang Fish free?

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

### Do Luckysmart Sonar or Erchang Fish have ads?

Neither Luckysmart Sonar nor Erchang Fish shows ads.

### Which is updated more often, Luckysmart Sonar or Erchang Fish?

Luckysmart Sonar ships an update every 15 months, and Erchang Fish every 7 months. Most recently, Luckysmart Sonar was updated on November 3, 2026 and Erchang Fish on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*