# Learn Thermal Engineering vs AVR Projects

The clearest difference is price: AVR Projects at Free against Learn Thermal Engineering's $1.99. AVR Projects also leads on update cadence (daily vs every 39 months). Learn Thermal Engineering's advantage is in-app purchases (none vs 10) and iOS requirement (15.6 vs 17.0). On ads and device support there is nothing between them.

AVR Projects is free to download; Learn Thermal Engineering costs $1.99 up front. AVR Projects sells 10 one-off in-app purchases. Learn Thermal Engineering asks for nothing beyond the download.

Learn Thermal Engineering ships an update every 39 months, AVR Projects daily. The most recent releases landed on September 25, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Learn Thermal Engineering | AVR Projects |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Daily** |
| Size | 43 MB | 20 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Muhammad Umair](https://appshunter.io/developer/1696049320) | [Zaw Win Myat](https://appshunter.io/developer/1800881321) |

## What reviewers say

### Learn Thermal Engineering

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

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

**In-app purchases:** none


### AVR Projects

[App page](https://appshunter.io/ios/app/avr-projects/id6745124011)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| R2R Ladder DAC | $0.99 | one-time |
| Sawtooth Waveform | $0.99 | one-time |
| Triangular Waveform | $0.99 | one-time |
| Sine Waveform | $0.99 | one-time |
| Ammeter AVR | $0.99 | one-time |
| 4x3 Matrix Keypad | $0.99 | one-time |
| Ohm Meter AVR | $0.99 | one-time |
| Voltmeter AVR | $0.99 | one-time |
| TM1637 Interfacing with AVR | $0.99 | one-time |
| Graphic LCD Interfacing | $0.99 | one-time |


## Frequently asked questions

### Is Learn Thermal Engineering free?

Learn Thermal Engineering costs $1.99, with no in-app purchases.

### Is AVR Projects free?

AVR Projects is free to download, with in-app purchases available.

### Do Learn Thermal Engineering or AVR Projects have ads?

Neither Learn Thermal Engineering nor AVR Projects shows ads.

### Which is updated more often, Learn Thermal Engineering or AVR Projects?

Learn Thermal Engineering ships an update every 39 months, and AVR Projects daily. Most recently, Learn Thermal Engineering was updated on September 25, 2026 and AVR Projects on September 9, 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.*