# Sine Qua Non vs dou

The clearest difference is in-app purchases: Sine Qua Non at none against dou's 2. Sine Qua Non also leads on update cadence (every 3 days vs weekly) and iOS requirement (13.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. dou sells 2 in-app purchases, starting at $3.99 per month. Sine Qua Non asks for nothing beyond the download.

Sine Qua Non ships an update every 3 days, dou weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Sine Qua Non | dou |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | Free | — |
| Size | 109 MB | 139 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Mile Positioning Solutions](https://appshunter.io/developer/1109385255) | [THIBAULT MATHIEU DOUX](https://appshunter.io/developer/1817003827) |

## What reviewers say

### Sine Qua Non

[App page](https://appshunter.io/ios/app/sine-qua-non/id1600669530)

This app uses running and walking routes, along with video-assisted exercises, to promote women's empowerment and combat sexist violence. It aims to foster resilience, pride, and encounters through sport, contributing to gender equality.

**Highlights:** Audio-guided running and walking routes, Downloadable routes, Video-assisted physical exercises, Personal performance tracking, Apple Health integration, Group running sessions

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

**In-app purchases:** none


### dou

[App page](https://appshunter.io/ios/app/dou/id6746456161)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dou Plus | $3.99 | per month |
| Dou Plus | $34.99 | per year |


## Frequently asked questions

### Is Sine Qua Non free?

Sine Qua Non is free to download, with no in-app purchases.

### Is dou free?

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

### Do Sine Qua Non or dou have ads?

Neither Sine Qua Non nor dou shows ads.

### Which is updated more often, Sine Qua Non or dou?

Sine Qua Non ships an update every 3 days, and dou weekly. Most recently, Sine Qua Non was updated on October 24, 2026 and dou 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.*