# Ok To Drive vs Permille

The clearest difference is review sentiment: Permille at 100% against Ok To Drive's 8%. Permille also leads on in-app purchases (none vs 5) and update cadence (every 2 weeks vs every 6 weeks). Ok To Drive's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Ok To Drive sells 5 one-off in-app purchases. Permille asks for nothing beyond the download.

Ok To Drive ships an update every 6 weeks, Permille every 2 weeks. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ok To Drive | Permille |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (44 ratings)](https://appshunter.io/ios/app/ok-to-drive/id1484576326/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 8.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Monetization | Paid | **Free** |
| Size | 47 MB | 10 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Martin Schurmann](https://appshunter.io/developer/1469819101) | [Johann Brockstedt](https://appshunter.io/developer/6784398291) |

## What reviewers say

### Ok To Drive

[App page](https://appshunter.io/ios/app/ok-to-drive/id1484576326)

Estimate your Blood Alcohol Content (BAC) based on your physical attributes, alcohol, and food consumption. This tool provides an approximation to help you make informed decisions about driving.

**Highlights:** BAC level estimation, Algorithm based on weight and gender, Tracks alcohol and food consumed, Educational information on BAC, Promotes responsible choices

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $0.99 | one-time |
| Ok To Drive Pro | $2.99 | one-time |
| Small Tip | $2.99 | one-time |
| Medium Tip | $6.99 | one-time |
| Big Tip | $12.99 | one-time |


### Permille

[App page](https://appshunter.io/ios/app/permille/id6787531362)

Track your alcohol and caffeine intake to understand their effects on your body. Get estimates for blood-alcohol levels, caffeine impact, and personalized hydration guidance. Features include daily totals, drink mixing, and social sharing for friends.

**Highlights:** Blood-alcohol level estimation, Caffeine level tracking, Hydration reminders, Daily intake totals (alcohol, caffeine, sugar, calories, cost), Custom drink mixing, Social sharing with friends

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

**In-app purchases:** none


## Frequently asked questions

### Is Ok To Drive free?

Ok To Drive is free to download, with in-app purchases available.

### Is Permille free?

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

### Do Ok To Drive or Permille have ads?

Neither Ok To Drive nor Permille shows ads.

### Which is updated more often, Ok To Drive or Permille?

Ok To Drive ships an update every 6 weeks, and Permille every 2 weeks. Most recently, Ok To Drive was updated on November 7, 2026 and Permille on October 31, 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.*