# 复利计算机 vs Retro Gallery

The clearest difference is in-app purchases: Retro Gallery at none against 复利计算机's 1. Retro Gallery also leads on iOS requirement (8.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 复利计算机 sells 1 one-off in-app purchase. Retro Gallery asks for nothing beyond the download.

复利计算机 ships an update every 2 months, Retro Gallery every 5 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 复利计算机 | Retro Gallery |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 41 MB | 67 MB |
| Requires iOS | 15.6 | **8.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [potato](https://appshunter.io/developer/370828186) | [HopIN Digitech Co., Ltd.](https://appshunter.io/developer/1147023944) |

## What reviewers say

### 复利计算机

[App page](https://appshunter.io/ios/app/id370828183)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Eliminate Advertisement | $0.99 | one-time |


### Retro Gallery

[App page](https://appshunter.io/ios/app/retro-gallery/id1268920688)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 复利计算机 free?

复利计算机 is free to download, with in-app purchases available.

### Is Retro Gallery free?

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

### Do 复利计算机 or Retro Gallery have ads?

Neither 复利计算机 nor Retro Gallery shows ads.

### Which is updated more often, 复利计算机 or Retro Gallery?

复利计算机 ships an update every 2 months, and Retro Gallery every 5 weeks. Most recently, 复利计算机 was updated on November 6, 2026 and Retro Gallery 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.*