# Decay Lab vs Euler Gamma

The clearest difference is update cadence: Decay Lab at every 4 days against Euler Gamma's every 9 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Decay Lab ships an update every 4 days, Euler Gamma every 9 days. The most recent releases landed on September 15, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Decay Lab | Euler Gamma |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Size | 6 MB | 14 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Uribe](https://appshunter.io/developer/1818871232) | [音 卢](https://appshunter.io/developer/1895433682) |

## What reviewers say

### Decay Lab

[App page](https://appshunter.io/ios/app/decay-lab/id6746874842)

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

**In-app purchases:** none


### Euler Gamma

[App page](https://appshunter.io/ios/app/euler-gamma-ndt-calculator/id6772123721)

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

**In-app purchases:** none


## Frequently asked questions

### Is Decay Lab free?

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

### Is Euler Gamma free?

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

### Do Decay Lab or Euler Gamma have ads?

Neither Decay Lab nor Euler Gamma shows ads.

### Which is updated more often, Decay Lab or Euler Gamma?

Decay Lab ships an update every 4 days, and Euler Gamma every 9 days. Most recently, Decay Lab was updated on September 15, 2026 and Euler Gamma 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.*