# Lupa OS vs PetMetrix

The clearest difference is in-app purchases: Lupa OS at none against PetMetrix's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PetMetrix sells 1 one-off in-app purchase. Lupa OS asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Lupa OS | PetMetrix |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Size | 74 MB | 2 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Lupa Pets LTD](https://appshunter.io/developer/1689102341) | [Wesley White](https://appshunter.io/developer/1882400604) |

## What reviewers say

### Lupa OS

[App page](https://appshunter.io/ios/app/lupa-os/id6747253756)

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

**In-app purchases:** none


### PetMetrix

[App page](https://appshunter.io/ios/app/petmetrix/id6760033538)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PetMetrix Full Version | $3.99 | one-time |


## Frequently asked questions

### Is Lupa OS free?

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

### Is PetMetrix free?

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

### Do Lupa OS or PetMetrix have ads?

Neither Lupa OS nor PetMetrix shows ads.

### Which is updated more often, Lupa OS or PetMetrix?

Lupa OS ships an update every 6 weeks, and PetMetrix every 6 weeks. Most recently, Lupa OS was updated on October 30, 2026 and PetMetrix 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.*