# SittingPostureCHECKER vs rectify

The clearest difference is in-app purchases: SittingPostureCHECKER at none against rectify's 1. SittingPostureCHECKER also leads on ads (none vs shown). rectify's advantage is update cadence (every 3 days vs every 6 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. rectify sells 1 in-app purchase, starting at $4.99 per month. SittingPostureCHECKER asks for nothing beyond the download.

SittingPostureCHECKER ships an update every 6 months, rectify every 3 days. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SittingPostureCHECKER | rectify |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 3 days** |
| Size | 2 MB | 189 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Medic Engineering K.K.](https://appshunter.io/developer/917118875) | [MinkTec GmbH](https://appshunter.io/developer/1634767386) |

## What reviewers say

### SittingPostureCHECKER

[App page](https://appshunter.io/ios/app/sittingposturechecker-s/id1281866599)

**In-app purchases:** none


### rectify

[App page](https://appshunter.io/ios/app/rectify-posture-tracking/id1634767384)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AirPods Head Tracking | $4.99 | per month |


## Frequently asked questions

### Is SittingPostureCHECKER free?

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

### Is rectify free?

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

### Do SittingPostureCHECKER or rectify have ads?

rectify shows ads; SittingPostureCHECKER does not.

### Which is updated more often, SittingPostureCHECKER or rectify?

SittingPostureCHECKER ships an update every 6 months, and rectify every 3 days. Most recently, SittingPostureCHECKER was updated on October 9, 2026 and rectify on October 1, 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.*