# Cardalis vs Ovyso

The clearest difference is in-app purchases: Cardalis at none against Ovyso's 1. Cardalis also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). Ovyso's advantage is update cadence (every 2 days vs every 6 weeks). On price and ads there is nothing between them.

Both are free to download. Ovyso sells 1 one-off in-app purchase. Cardalis asks for nothing beyond the download.

Cardalis ships an update every 6 weeks, Ovyso every 2 days. The most recent releases landed on October 21, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Cardalis | Ovyso |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (260 ratings)](https://appshunter.io/ios/app/cardalis/id569166179/reviews)** | — |
| Number of ratings | **260** | — |
| Positive reviews | 20.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 22 MB | 101 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Ceva Sante Animale S.A.](https://appshunter.io/developer/566622266) | [Mert Can Gozukara](https://appshunter.io/developer/1880178368) |

## What reviewers say

### Cardalis

[App page](https://appshunter.io/ios/app/cardalis/id569166179)

Monitor your dog's resting respiratory rate to help manage heart failure. This app helps you record and graph the data, which can then be emailed to your veterinarian.

**Highlights:** Measure resting respiratory rate, Record rate as a graph, Email results to veterinarian, Track heart failure progression, Informational and educational tool

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

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use interface
- 📊 Clear graph visualization of breathing/heart rate data
- 🔔 Helpful medication and monitoring reminders
- 📧 Ability to email data to veterinarians
- ⏱️ Automatic 30-second timer with calculation

**What reviewers complain about**

- 🐛 Data loss after app updates (critical issue)
- 🐛 App crashes and freezes frequently
- 📧 Email and print functionality broken or removed
- 🔒 Excessive data collection (vet name, email required)
- 🐕 Dog-centric branding excludes cat owners

**Reported bugs**

- Critical data loss during app updates
- App freezes and crashes on launch or navigation
- Email functionality not working or removed
- Print functionality broken or removed
- Notes not saved or retrievable

**Requested features**

- Support for multiple pets/dogs in single app
- Cat-friendly version or pet-neutral branding
- Ability to add notes to all readings (not just high ones)
- Customizable timer intervals (15, 60 seconds)
- Ability to enter past/historical readings


### Ovyso

[App page](https://appshunter.io/ios/app/ovyso/id6810986871)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ovyso Pro | $9.99 | one-time |


## Frequently asked questions

### Is Cardalis free?

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

### Is Ovyso free?

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

### Do Cardalis or Ovyso have ads?

Neither Cardalis nor Ovyso shows ads.

### Which is updated more often, Cardalis or Ovyso?

Cardalis ships an update every 6 weeks, and Ovyso every 2 days. Most recently, Cardalis was updated on October 21, 2026 and Ovyso on October 8, 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.*