# i vs THU

The clearest difference is price: THU at Free against i's $4.99. THU also leads on update cadence (every 3 weeks vs every 7 months). i's advantage is iOS requirement (13.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

THU is free to download; i costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

i ships an update every 7 months, THU every 3 weeks. The most recent releases landed on October 21, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | i | THU |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/i-logo/id435280247/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 81.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 6 MB | 6 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPad, Mac | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [CROMBEZ Emmanuel](https://appshunter.io/developer/375656695) | [Manfred Sablotny](https://appshunter.io/developer/1704998794) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-logo/id435280247)

This app is an interpreted programming language designed for educational purposes, focusing on functional programming capabilities. It allows users to test calculations, recursion, and array usage, serving as a teaching tool rather than for developing full applications.

**Highlights:** Functional programming, Global and local variables, Polish notation calculations, Recursive testing, Array usage, Interpreted language

**In-app purchases:** none


### THU

[App page](https://appshunter.io/ios/app/thu-deutsch/id6473107181)

**In-app purchases:** none


## Frequently asked questions

### Is i free?

i costs $4.99, with no in-app purchases.

### Is THU free?

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

### Do i or THU have ads?

Neither i nor THU shows ads.

### Which is updated more often, i or THU?

i ships an update every 7 months, and THU every 3 weeks. Most recently, i was updated on October 21, 2026 and THU on October 3, 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.*