# Posture Trainer vs Plank Form Timer

The clearest difference is ads: Posture Trainer at none against Plank Form Timer's shown. Plank Form Timer's advantage is update cadence (every 2 weeks vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Posture Trainer sells 3 in-app purchases, starting at $6.99 per 7 days and Plank Form Timer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Posture Trainer ships an update monthly, Plank Form Timer every 2 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | Posture Trainer | Plank Form Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 13 MB | 13 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Phuc Pham](https://appshunter.io/developer/1893081423) | [Hosung Hwang](https://appshunter.io/developer/6789744714) |

## What reviewers say

### Posture Trainer

[App page](https://appshunter.io/ios/app/posture-trainer-sit-straight/id6772211099)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Yearly | $34.99 | per year |
| Lifetime Pro | $69.99 | one-time |


### Plank Form Timer

[App page](https://appshunter.io/ios/app/plank-form-timer-ai-check/id6793725781)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is Posture Trainer free?

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

### Is Plank Form Timer free?

Plank Form Timer is free to download, with in-app purchases available.

### Do Posture Trainer or Plank Form Timer have ads?

Plank Form Timer shows ads; Posture Trainer does not.

### Which is updated more often, Posture Trainer or Plank Form Timer?

Posture Trainer ships an update monthly, and Plank Form Timer every 2 weeks. Most recently, Posture Trainer was updated on October 25, 2026 and Plank Form Timer 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.*