# PASSCODES vs Ultra N Back

The clearest difference is in-app purchases: PASSCODES at none against Ultra N Back's 2. Ultra N Back's advantage is update cadence (every 4 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Ultra N Back sells 2 in-app purchases, starting at $0.99 per month. PASSCODES asks for nothing beyond the download.

PASSCODES ships an update every 2 months, Ultra N Back every 4 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PASSCODES | Ultra N Back |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 16 MB | 57 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KENICHI YAMAMOTO](https://appshunter.io/developer/1335325739) | [Ayumu Kawahara](https://appshunter.io/developer/1835186601) |

## What reviewers say

### PASSCODES

[App page](https://appshunter.io/ios/app/passcodes/id6737499782)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ultra N Back

[App page](https://appshunter.io/ios/app/ultra-n-back-brain-training/id6751448185)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan | $0.99 | per month |
| Unlimited Plan | $1.99 | per month |


## Frequently asked questions

### Is PASSCODES free?

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

### Is Ultra N Back free?

Ultra N Back is free to download, with in-app purchases available.

### Do PASSCODES or Ultra N Back have ads?

Both PASSCODES and Ultra N Back show ads.

### Which is updated more often, PASSCODES or Ultra N Back?

PASSCODES ships an update every 2 months, and Ultra N Back every 4 days. Most recently, PASSCODES was updated on October 27, 2026 and Ultra N Back on October 28, 2026.

---

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