# UpRight vs Calfmaxx

The clearest difference is update cadence: UpRight at every 4 days against Calfmaxx's every 6 weeks. Calfmaxx's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. UpRight sells 2 in-app purchases, starting at $4.99 per 7 days and Calfmaxx sells 2 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpRight ships an update every 4 days, Calfmaxx every 6 weeks. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | UpRight | Calfmaxx |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 weeks |
| Size | 34 MB | 90 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [cynq ventures](https://appshunter.io/developer/1804133893) | [Valet Hero LLC](https://appshunter.io/developer/1780020867) |

## What reviewers say

### UpRight

[App page](https://appshunter.io/ios/app/upright-posture-coach/id6747097271)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UpRight Premium Weekly | $4.99 | per 7 days |
| UpRight Premium | $24.99 | per year |


### Calfmaxx

[App page](https://appshunter.io/ios/app/calfmaxx/id6796440695)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $3.99 | per 7 days |
| Yearly Plan | $29.99 | per year |


## Frequently asked questions

### Is UpRight free?

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

### Is Calfmaxx free?

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

### Do UpRight or Calfmaxx have ads?

Neither UpRight nor Calfmaxx shows ads.

### Which is updated more often, UpRight or Calfmaxx?

UpRight ships an update every 4 days, and Calfmaxx every 6 weeks. Most recently, UpRight was updated on October 9, 2026 and Calfmaxx on October 16, 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.*