# MTL Tempus vs MistakeBook

The clearest difference is price: MTL Tempus at Free against MistakeBook's $1.99. MTL Tempus also leads on update cadence (daily vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

MTL Tempus is free to download; MistakeBook costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MTL Tempus ships an update daily, MistakeBook monthly. The most recent releases landed on October 1, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | MTL Tempus | MistakeBook |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Monthly |
| Monetization | — | Paid |
| Size | 24 MB | 26 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MUSICTECH LAB SP Z O O](https://appshunter.io/developer/1450391485) | [Xiamen City Fanyou Network Technology Co., Ltd.](https://appshunter.io/developer/1842524161) |

## What reviewers say

### MTL Tempus

[App page](https://appshunter.io/ios/app/mtl-tempus/id6755827507)

**Features:** macOS Compatibility

**In-app purchases:** none


### MistakeBook

[App page](https://appshunter.io/ios/app/mistakebook-wrong-answer-log/id6770173206)

Log and review incorrect answers to improve learning. Organize mistakes by subject and topic, and utilize spaced repetition to reinforce weak areas. Track progress with visual charts and daily check-ins for effective test preparation.

**Highlights:** Log mistakes with photos and notes, Organize by subject and custom tags, Spaced repetition review mode, Ebbinghaus forgetting curve schedule, Progress charts and stats dashboard, Data import/export backup

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

**In-app purchases:** none


## Frequently asked questions

### Is MTL Tempus free?

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

### Is MistakeBook free?

MistakeBook costs $1.99, with no in-app purchases.

### Do MTL Tempus or MistakeBook have ads?

Neither MTL Tempus nor MistakeBook shows ads.

### Which is updated more often, MTL Tempus or MistakeBook?

MTL Tempus ships an update daily, and MistakeBook monthly. Most recently, MTL Tempus was updated on October 1, 2026 and MistakeBook on October 17, 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.*