# SAFE SERVICE® vs Theorie X

The clearest difference is in-app purchases: SAFE SERVICE® at none against Theorie X's 4. SAFE SERVICE® also leads on ads (none vs shown) and iOS requirement (14.0 vs 17.6). Theorie X's advantage is update cadence (every 10 days vs every 4 months). On price and device support there is nothing between them.

Both are free to download. Theorie X sells 4 in-app purchases, starting at $8.99 per month. SAFE SERVICE® asks for nothing beyond the download.

SAFE SERVICE® ships an update every 4 months, Theorie X every 10 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | SAFE SERVICE® | Theorie X |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 94.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 129 MB | 153 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [duftner.digital services GmbH](https://appshunter.io/developer/1492246856) | [Tolga Calis](https://appshunter.io/developer/1888967984) |

## What reviewers say

### SAFE SERVICE®

[App page](https://appshunter.io/ios/app/safe-service/id1532899476)

**Features:** macOS Compatibility

**In-app purchases:** none


### Theorie X

[App page](https://appshunter.io/ios/app/theorie-x/id6761335272)

Prepare for your driving theory test with AI-powered learning, interactive clips from instructors, and realistic exam simulations. Engage in duels with other learners and track your progress with a motivational ranking system. Discover local driving schools and exclusive offers.

**Highlights:** AI-powered learning assistance, Interactive clips from driving instructors, Realistic exam simulations, 1v1 learner duels, Progress tracking and ranking system, Themed learning modules

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TheorieX Premium 1 Months | $8.99 | per month |
| TheorieX Premium 3 Months | $22.99 | per 3 months |
| TheorieX Premium 6 Months | $39.99 | per 6 months |
| TheorieX Premium 12 Months | $79.99 | per year |


## Frequently asked questions

### Is SAFE SERVICE® free?

SAFE SERVICE® is free to download, with no in-app purchases.

### Is Theorie X free?

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

### Do SAFE SERVICE® or Theorie X have ads?

Theorie X shows ads; SAFE SERVICE® does not.

### Which is updated more often, SAFE SERVICE® or Theorie X?

SAFE SERVICE® ships an update every 4 months, and Theorie X every 10 days. Most recently, SAFE SERVICE® was updated on November 3, 2026 and Theorie X on November 5, 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.*