# Aïda vs Contraction Timer

The clearest difference is ads: Aïda at none against Contraction Timer's shown. Contraction Timer's advantage is update cadence (every 2 days vs every 15 months) and iOS requirement (15.1 vs 18.0). On price, 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.

Aïda ships an update every 15 months, Contraction Timer every 2 days. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Aïda | Contraction Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 15 months | **Every 2 days** |
| Size | 54 MB | 25 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Property24](https://appshunter.io/developer/1033181572) | [Blas Prieto](https://appshunter.io/developer/1878084920) |

## What reviewers say

### Aïda

[App page](https://appshunter.io/ios/app/aida/id1098838120)

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

**In-app purchases:** none


### Contraction Timer

[App page](https://appshunter.io/ios/app/contraction-timer-5-1-1/id6759358935)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Aïda free?

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

### Is Contraction Timer free?

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

### Do Aïda or Contraction Timer have ads?

Contraction Timer shows ads; Aïda does not.

### Which is updated more often, Aïda or Contraction Timer?

Aïda ships an update every 15 months, and Contraction Timer every 2 days. Most recently, Aïda was updated on October 3, 2026 and Contraction Timer on October 7, 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.*