# Not Bad Days vs SMTZ

The clearest difference is update cadence: SMTZ at every 6 months against Not Bad Days's every 12 months. SMTZ also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

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

Not Bad Days ships an update every 12 months, SMTZ every 6 months. The most recent releases landed on November 8, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Not Bad Days | SMTZ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 12 months | **Every 6 months** |
| Size | 80 MB | 50 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Amelie Gaulet](https://appshunter.io/developer/1748770808) | [SMTZ](https://appshunter.io/developer/1794715671) |

## What reviewers say

### Not Bad Days

[App page](https://appshunter.io/ios/app/not-bad-days/id6503292123)

**In-app purchases:** none


### SMTZ

[App page](https://appshunter.io/ios/app/smtz/id6741564959)

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

**In-app purchases:** none


## Frequently asked questions

### Is Not Bad Days free?

Not Bad Days is free to download, with no in-app purchases.

### Is SMTZ free?

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

### Which is updated more often, Not Bad Days or SMTZ?

Not Bad Days ships an update every 12 months, and SMTZ every 6 months. Most recently, Not Bad Days was updated on November 8, 2026 and SMTZ on November 7, 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.*