# Restraint Log vs UnDo

The clearest difference is update cadence: UnDo at every 5 days against Restraint Log's every 4 months. Restraint Log's advantage is iOS requirement (13.0 vs 17.6). 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.

Restraint Log ships an update every 4 months, UnDo every 5 days. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Restraint Log | UnDo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Size | 19 MB | 1 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Hangzhou Julin Technology Co., Ltd](https://appshunter.io/developer/1597551892) | [朝峰 陈](https://appshunter.io/developer/1868597907) |

## What reviewers say

### Restraint Log

[App page](https://appshunter.io/ios/app/restraint-log/id6759511223)

**Features:** macOS Compatibility

**In-app purchases:** none


### UnDo

[App page](https://appshunter.io/ios/app/undo/id6761196951)

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

**In-app purchases:** none


## Frequently asked questions

### Is Restraint Log free?

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

### Is UnDo free?

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

### Do Restraint Log or UnDo have ads?

Neither Restraint Log nor UnDo shows ads.

### Which is updated more often, Restraint Log or UnDo?

Restraint Log ships an update every 4 months, and UnDo every 5 days. Most recently, Restraint Log was updated on October 9, 2026 and UnDo on October 8, 2026.

---

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