# Tetra vs PetScale App

The clearest difference is update cadence: PetScale App at every 3 weeks against Tetra's every 13 months. PetScale App also leads on iOS requirement (15.1 vs 17.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. 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 PetScale App. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Tetra ships an update every 13 months, PetScale App every 3 weeks. The most recent releases landed on October 28, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Tetra | PetScale App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/tetra-box-breathing/id6753811461/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/petscale-app/id6760725889/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 3 MB | 42 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Eric Seitz](https://appshunter.io/developer/1845132163) | [Elizabeth Niederman](https://appshunter.io/developer/1879526310) |

## 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


### PetScale App

[App page](https://appshunter.io/ios/app/petscale-app/id6760725889)

This app provides science-backed weight tracking for pets, calculating personalized healthy weight ranges based on species, breed, gender, and age. It offers tools and guidance for pets to reach and maintain their ideal weight, with features like progress charts and appointment reminders.

**Highlights:** Breed & profile-specific weight tracking, Weight history and progress charts, Personalized goal recommendations, Appointment reminders, Supports multiple pet species and breeds, Clean dashboard for weight and appointments

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

**In-app purchases:** none


## Frequently asked questions

### Is Tetra free?

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

### Is PetScale App free?

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

### Which has better reviews, Tetra or PetScale App?

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

### Do Tetra or PetScale App have ads?

Neither Tetra nor PetScale App shows ads.

### Which is updated more often, Tetra or PetScale App?

Tetra ships an update every 13 months, and PetScale App every 3 weeks. Most recently, Tetra was updated on October 28, 2026 and PetScale App on October 10, 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.*