# ThinkFast vs Guess.it

The clearest difference is price: Guess.it at Free against ThinkFast's $0.99. Guess.it also leads on update cadence (every 3 days vs every 10 days). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Guess.it is free to download; ThinkFast costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ThinkFast ships an update every 10 days, Guess.it every 3 days. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | ThinkFast | Guess.it |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 3 days** |
| Monetization | Paid | — |
| Size | 4 MB | 83 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RHS International GmbH](https://appshunter.io/developer/408977594) | [Hubert Willy Lehmann](https://appshunter.io/developer/1684815110) |

## What reviewers say

### ThinkFast

[App page](https://appshunter.io/ios/app/thinkfast-quiz/id980958018)

Test your knowledge and speed with a challenging quiz game. Answer difficult questions across various subjects in a limited time. It's a fun way to increase and maintain your knowledge on the go.

**Highlights:** Timed challenges, Multiple subject categories, Daily knowledge boost, Apple Watch support, Constant question updates

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Guess.it

[App page](https://appshunter.io/ios/app/guessit/id6482974091)

**In-app purchases:** none


## Frequently asked questions

### Is ThinkFast free?

ThinkFast costs $0.99, with no in-app purchases.

### Is Guess.it free?

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

### Do ThinkFast or Guess.it have ads?

Neither ThinkFast nor Guess.it shows ads.

### Which is updated more often, ThinkFast or Guess.it?

ThinkFast ships an update every 10 days, and Guess.it every 3 days. Most recently, ThinkFast was updated on October 24, 2026 and Guess.it on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*