# Mnemonic Brain vs SoberDeck

The clearest difference is update cadence: Mnemonic Brain at fortnightly against SoberDeck's every 2 months. SoberDeck's advantage is iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Mnemonic Brain sells 1 one-off in-app purchase and SoberDeck sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Mnemonic Brain ships an update fortnightly, SoberDeck every 2 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Mnemonic Brain | SoberDeck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 15 MB | 3 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Gerhard Lentschik](https://appshunter.io/developer/629988041) | [Perry Hampton](https://appshunter.io/developer/1826133992) |

## What reviewers say

### Mnemonic Brain

[App page](https://appshunter.io/ios/app/mnemonic-brain-training/id1456363656)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertising | $1.99 | one-time |


### SoberDeck

[App page](https://appshunter.io/ios/app/soberdeck-sobriety-tracker/id6775606069)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Annual | $29.99 | per year |


## Frequently asked questions

### Is Mnemonic Brain free?

Mnemonic Brain is free to download, with in-app purchases available.

### Is SoberDeck free?

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

### Do Mnemonic Brain or SoberDeck have ads?

Neither Mnemonic Brain nor SoberDeck shows ads.

### Which is updated more often, Mnemonic Brain or SoberDeck?

Mnemonic Brain ships an update fortnightly, and SoberDeck every 2 months. Most recently, Mnemonic Brain was updated on October 7, 2026 and SoberDeck on October 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*