# Thermodynamic Cycles vs Physics Formulas

Thermodynamic Cycles and Physics Formulas are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Thermodynamic Cycles sells 4 one-off in-app purchases and Physics Formulas sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Thermodynamic Cycles ships an update every 3 months, Physics Formulas every 2 months. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Thermodynamic Cycles | Physics Formulas |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 50 MB | 38 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Angus Malcolm](https://appshunter.io/developer/834153229) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### Thermodynamic Cycles

[App page](https://appshunter.io/ios/app/thermodynamic-cycles/id834153226)

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gas Power Cycles | $0.49 | one-time |
| Refrigeration Cycles | $0.49 | one-time |
| Vapor Power Cycles | $0.49 | one-time |
| Unlock All | $0.99 | one-time |


### Physics Formulas

[App page](https://appshunter.io/ios/app/physics-formulas-physref/id6757826240)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $2.99 | per 7 days |
| Lifetime Access | $49.99 | one-time |


## Frequently asked questions

### Is Thermodynamic Cycles free?

Thermodynamic Cycles is free to download, with in-app purchases available.

### Is Physics Formulas free?

Physics Formulas is free to download, with in-app purchases available.

### Do Thermodynamic Cycles or Physics Formulas have ads?

Neither Thermodynamic Cycles nor Physics Formulas shows ads.

### Which is updated more often, Thermodynamic Cycles or Physics Formulas?

Thermodynamic Cycles ships an update every 3 months, and Physics Formulas every 2 months. Most recently, Thermodynamic Cycles was updated on September 17, 2026 and Physics Formulas on September 11, 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.*