# Tetra vs FormCheck+

The clearest difference is price: Tetra at Free against FormCheck+'s $1.99. FormCheck+'s advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On rating, review sentiment, ratings volume and ads there is nothing between them.

Tetra is free to download; FormCheck+ costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Tetra against 5.0 for FormCheck+. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | Tetra | FormCheck+ |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/tetra-box-breathing/id6753811461/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/formcheck-plus/id6759869973/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | — |
| Monetization | **Free** | Paid |
| Size | 3 MB | 194 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Eric Seitz](https://appshunter.io/developer/1845132163) | [Dana Hallock](https://appshunter.io/developer/1881334862) |

## What reviewers say

### Tetra

[App page](https://appshunter.io/ios/app/tetra-box-breathing/id6753811461)

This app guides you through box breathing exercises using subtle haptic feedback. It helps you slow down, focus, and reset your nervous system with a distraction-free design. Enjoy quick sessions anytime without sound or sign-ups.

**Highlights:** Adjustable breathing rhythm, Subtle haptic feedback, Minimalist design, Silent mode compatibility, One-tap start

**In-app purchases:** none


### FormCheck+

[App page](https://appshunter.io/ios/app/formcheck-plus/id6759869973)

This app provides AI-powered analysis of your workouts and form, offering corrective exercises and safety feedback. Track progress with photos, measurements, and PRs, and receive personalized workout plans and insights into muscle engagement.

**Highlights:** AI verbal analysis and corrective exercises, Progress photo and body measurement tracking, Fitness goal checklist and PR dashboard, Cardio and workout logging, AI coaching chat for analysis breakdown, Technique checklist and gear suggestions, Muscle dashboard and smart training calendar

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tetra free?

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

### Is FormCheck+ free?

FormCheck+ costs $1.99, with no in-app purchases.

### Which has better reviews, Tetra or FormCheck+?

Tetra and FormCheck+ are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Tetra or FormCheck+ have ads?

Neither Tetra nor FormCheck+ shows ads.

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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.*