# ZIO vs Marengo

The clearest difference is review sentiment: Marengo at 77% against ZIO's 0%. Marengo also leads on update cadence (monthly vs every 6 months). ZIO's advantage is iOS requirement (12.0 vs 15.5). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ZIO ships an update every 6 months, Marengo monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | ZIO | Marengo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | **76.9% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Monthly** |
| Monetization | Free | Free |
| Size | 14 MB | 72 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Virginie Bonura](https://appshunter.io/developer/1599785228) | [Marengo Inc.](https://appshunter.io/developer/1668893228) |

## What reviewers say

### ZIO

[App page](https://appshunter.io/ios/app/zio/id1599785226)

This app helps you follow your prescribed rehabilitation exercises from your therapist. It provides guidance to ensure your success in your recovery journey, allowing you to maintain your program anywhere.

**Highlights:** Follow prescribed exercises, Therapist-guided rehabilitation, Track exercise program, Support for recovery, Mobile accessibility

**In-app purchases:** none


### Marengo

[App page](https://appshunter.io/ios/app/marengo/id1668893226)

This comprehensive pet health app offers a user-friendly platform for managing your pet's medical history, appointments, and general care. It includes a unique Lost Pet Mode for added safety and provides valuable information on pet care, grooming, and health issues.

**Highlights:** Pet medical history tracking, Appointment management, Lost Pet Mode with alerts, Pet care information and tips, Secure data storage, Shareable access for family/friends

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

**In-app purchases:** none


## Frequently asked questions

### Is ZIO free?

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

### Is Marengo free?

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

### Do ZIO or Marengo have ads?

Neither ZIO nor Marengo shows ads.

### Which is updated more often, ZIO or Marengo?

ZIO ships an update every 6 months, and Marengo monthly. Most recently, ZIO was updated on November 3, 2026 and Marengo on November 3, 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.*