# StackWise vs Contraction Timer

The clearest difference is update cadence: Contraction Timer at every 3 weeks against StackWise's every 2 months. StackWise's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. StackWise sells 2 in-app purchases, starting at $4.99 per month and Contraction Timer sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

StackWise ships an update every 2 months, Contraction Timer every 3 weeks. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | StackWise | Contraction Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 36 MB | 48 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Aliaksandr Liubchanka](https://appshunter.io/developer/1435734178) | [Utku Gogen](https://appshunter.io/developer/1677858400) |

## What reviewers say

### StackWise

[App page](https://appshunter.io/ios/app/stackwise-supplement-planner/id6760896206)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $4.99 | per month |
| Premium (Annual) | $29.99 | per year |


### Contraction Timer

[App page](https://appshunter.io/ios/app/contraction-timer-popzy/id6811453052)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Contraction Timer Weekly | $4.99 | per 7 days |
| Contraction Timer Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is StackWise free?

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

### Is Contraction Timer free?

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

### Do StackWise or Contraction Timer have ads?

Neither StackWise nor Contraction Timer shows ads.

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

StackWise ships an update every 2 months, and Contraction Timer every 3 weeks. Most recently, StackWise was updated on October 14, 2026 and Contraction Timer 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.*