# Incredible Numbers! vs Learn Thermal Engineering

The clearest difference is price: Learn Thermal Engineering at $2.99 against Incredible Numbers!'s $6.99. Learn Thermal Engineering also leads on device support (3 vs 1). Incredible Numbers!'s advantage is iOS requirement (12.1 vs 15.6). On update cadence, ads and in-app purchases there is nothing between them.

Incredible Numbers! costs $6.99 and Learn Thermal Engineering $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Incredible Numbers! ships an update every 10 months, Learn Thermal Engineering every 20 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Incredible Numbers! | Learn Thermal Engineering |
| --- | --- | --- |
| Price | $6.99 | **$2.99** |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/incredible-numbers/id824146218/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 73.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 20 months |
| Monetization | Paid | — |
| Size | 107 MB | 81 MB |
| Requires iOS | **12.1** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [NatureGuides Ltd.](https://appshunter.io/developer/310574314) | [Muhammad Umair](https://appshunter.io/developer/1696049320) |

## What reviewers say

### Incredible Numbers!

[App page](https://appshunter.io/ios/app/incredible-numbers/id824146218)

Explore the hidden beauty of mathematics with interactive examples and puzzles. Discover concepts like infinity, Pi, and prime numbers through engaging articles and demonstrations crafted by a renowned professor. Uncover the mathematical patterns in nature, music, and codes.

**Highlights:** 23 articles by Professor Ian Stewart, 71 interactive demonstrations, 15 mathematical puzzles, Topics: Infinity, Pi, Music, Codes, Nature, Primes, Polygons, Factorials, Interactive examples and simulations, Focus on the beauty of mathematics

**Features:** macOS Compatibility

**In-app purchases:** none


### Learn Thermal Engineering

[App page](https://appshunter.io/ios/app/learn-thermal-engineering/id6451246075)

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

**In-app purchases:** none


## Frequently asked questions

### Is Incredible Numbers! free?

Incredible Numbers! costs $6.99, with no in-app purchases.

### Is Learn Thermal Engineering free?

Learn Thermal Engineering costs $2.99, with no in-app purchases.

### Do Incredible Numbers! or Learn Thermal Engineering have ads?

Neither Incredible Numbers! nor Learn Thermal Engineering shows ads.

### Which is updated more often, Incredible Numbers! or Learn Thermal Engineering?

Incredible Numbers! ships an update every 10 months, and Learn Thermal Engineering every 20 months. Most recently, Incredible Numbers! was updated on November 1, 2026 and Learn Thermal Engineering on November 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.*