# Keep Your Promises vs Murmur

The clearest difference is in-app purchases: Murmur at none against Keep Your Promises's 3. Keep Your Promises's advantage is iOS requirement (15.1 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Keep Your Promises sells 3 in-app purchases, starting at $3.99 per month. Murmur asks for nothing beyond the download.

Keep Your Promises ships an update fortnightly, Murmur monthly. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Keep Your Promises | Murmur |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Size | 46 MB | 6 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rolando Barbella](https://appshunter.io/developer/1816312184) | [Luu Thi Tuyet Minh](https://appshunter.io/developer/1406224933) |

## What reviewers say

### Keep Your Promises

[App page](https://appshunter.io/ios/app/keep-your-promises/id6746349132)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Promises Pro Monthly | $3.99 | per month |
| Promises Pro Yearly | $24.99 | per year |
| Go Pro | $24.99 | one-time |


### Murmur

[App page](https://appshunter.io/ios/app/murmur-promise-box/id6764531911)

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

**In-app purchases:** none


## Frequently asked questions

### Is Keep Your Promises free?

Keep Your Promises is free to download, with in-app purchases available.

### Is Murmur free?

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

### Do Keep Your Promises or Murmur have ads?

Neither Keep Your Promises nor Murmur shows ads.

### Which is updated more often, Keep Your Promises or Murmur?

Keep Your Promises ships an update fortnightly, and Murmur monthly. Most recently, Keep Your Promises was updated on October 30, 2026 and Murmur on October 25, 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.*