# Repeat Sound vs 小丁同学

The clearest difference is iOS requirement: 小丁同学 at 13.0 against Repeat Sound's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Repeat Sound sells 1 one-off in-app purchase and 小丁同学 sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Repeat Sound ships an update every 2 weeks, 小丁同学 fortnightly. The most recent releases landed on September 23, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Repeat Sound | 小丁同学 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (7 ratings)](https://appshunter.io/ios/app/repeat-sound/id517565038/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 22 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [胜军 夏](https://appshunter.io/developer/493790029) | [Hangzhou Yida Electronic Technology Co., Ltd.](https://appshunter.io/developer/1517744915) |

## What reviewers say

### Repeat Sound

[App page](https://appshunter.io/ios/app/repeat-sound/id517565038)

Enhance language learning with precise audio repeat and playback controls.  Record and compare your pronunciation, add notes, and manage audio files for efficient study.

**Highlights:** Precise selection repeat, Automatic repeat with intervals, Add notes to selections, Adjustable playback speed, Background and lock screen playback, Automatic transcription generation, Recording comparison

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy bottle of water for author | $0.99 | one-time |


### 小丁同学

[App page](https://appshunter.io/ios/app/app/id1517745066)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2500学习币 | $3.99 | one-time |
| 5000学习币赠530学习币 | $6.99 | one-time |
| 10800学习币赠1200学习币 | $14.99 | one-time |
| 32800学习币赠4100学习币 | $49.99 | one-time |
| 64800学习币赠8700学习币 | $99.99 | one-time |


## Frequently asked questions

### Is Repeat Sound free?

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

### Is 小丁同学 free?

小丁同学 is free to download, with in-app purchases available.

### Do Repeat Sound or 小丁同学 have ads?

Neither Repeat Sound nor 小丁同学 shows ads.

### Which is updated more often, Repeat Sound or 小丁同学?

Repeat Sound ships an update every 2 weeks, and 小丁同学 fortnightly. Most recently, Repeat Sound was updated on September 23, 2026 and 小丁同学 on September 10, 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.*