# Air Checklists vs SIDEN

The clearest difference is update cadence: SIDEN at every 7 months against Air Checklists's every 15 months. Air Checklists's advantage is iOS requirement (16.0 vs 18.0). 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.

Air Checklists ships an update every 15 months, SIDEN every 7 months. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Air Checklists | SIDEN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 7 months** |
| Size | 1 MB | 77 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Gromozdin](https://appshunter.io/developer/1374615432) | [VivoKey Japan LLC](https://appshunter.io/developer/1463916189) |

## What reviewers say

### Air Checklists

[App page](https://appshunter.io/ios/app/air-checklists/id6443637924)

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

**In-app purchases:** none


### SIDEN

[App page](https://appshunter.io/ios/app/siden/id6752128234)

**In-app purchases:** none


## Frequently asked questions

### Is Air Checklists free?

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

### Is SIDEN free?

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

### Do Air Checklists or SIDEN have ads?

Neither Air Checklists nor SIDEN shows ads.

### Which is updated more often, Air Checklists or SIDEN?

Air Checklists ships an update every 15 months, and SIDEN every 7 months. Most recently, Air Checklists was updated on October 10, 2026 and SIDEN on October 25, 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.*