# 悦流 vs YesterYears

The clearest difference is in-app purchases: 悦流 at none against YesterYears's 1. 悦流 also leads on iOS requirement (14.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. YesterYears sells 1 in-app purchase, starting at $1.99 per month. 悦流 asks for nothing beyond the download.

悦流 ships an update every 2 weeks, YesterYears every 3 weeks. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 悦流 | YesterYears |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 36 MB | 3 MB |
| Requires iOS | **14.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ocean AI Co., Ltd.](https://appshunter.io/developer/1708513108) | [化军 徐](https://appshunter.io/developer/1847154180) |

## What reviewers say

### 悦流

[App page](https://appshunter.io/ios/app/ai/id6467845946)

**In-app purchases:** none


### YesterYears

[App page](https://appshunter.io/ios/app/yesteryears/id6789847990)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| YesterYears Pro | $1.99 | per month |


## Frequently asked questions

### Is 悦流 free?

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

### Is YesterYears free?

YesterYears is free to download, with in-app purchases available.

### Do 悦流 or YesterYears have ads?

Neither 悦流 nor YesterYears shows ads.

### Which is updated more often, 悦流 or YesterYears?

悦流 ships an update every 2 weeks, and YesterYears every 3 weeks. Most recently, 悦流 was updated on October 7, 2026 and YesterYears on October 8, 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.*