# Erchang Fish vs Rentadmin

The clearest difference is update cadence: Rentadmin at every 3 weeks against Erchang Fish's every 7 months. Erchang Fish's advantage is iOS requirement (9.3 vs 15.6). 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.

Erchang Fish ships an update every 7 months, Rentadmin every 3 weeks. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Erchang Fish | Rentadmin |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 68 MB | 20 MB |
| Requires iOS | **9.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [定敢 刘](https://appshunter.io/developer/1194376703) | [Polcern Sp. z o.o.](https://appshunter.io/developer/1855820442) |

## What reviewers say

### 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


### Rentadmin

[App page](https://appshunter.io/ios/app/rentadmin/id1606637585)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Erchang Fish free?

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

### Is Rentadmin free?

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

### Do Erchang Fish or Rentadmin have ads?

Neither Erchang Fish nor Rentadmin shows ads.

### Which is updated more often, Erchang Fish or Rentadmin?

Erchang Fish ships an update every 7 months, and Rentadmin every 3 weeks. Most recently, Erchang Fish was updated on October 14, 2026 and Rentadmin on October 11, 2026.

---

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