# Cardalis vs Cardalis Pre Psy

The clearest difference is update cadence: Cardalis at every 6 weeks against Cardalis Pre Psy's every 7 months. Cardalis Pre Psy's advantage is iOS requirement (7.1 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Cardalis ships an update every 6 weeks, Cardalis Pre Psy every 7 months. The most recent releases landed on October 29, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Cardalis | Cardalis Pre Psy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (262 ratings)](https://appshunter.io/ios/app/cardalis/id569166179/reviews)** | — |
| Number of ratings | **262** | — |
| Positive reviews | 20.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | Free | — |
| Size | 22 MB | 9 MB |
| Requires iOS | 15.0 | **7.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ceva Sante Animale S.A.](https://appshunter.io/developer/566622266) | [JAMES HOWELL](https://appshunter.io/developer/348637503) |

## 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


### Cardalis Pre Psy

[App page](https://appshunter.io/ios/app/cardalis-pre-psy/id944757769)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cardalis free?

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

### Is Cardalis Pre Psy free?

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

### Do Cardalis or Cardalis Pre Psy have ads?

Neither Cardalis nor Cardalis Pre Psy shows ads.

### Which is updated more often, Cardalis or Cardalis Pre Psy?

Cardalis ships an update every 6 weeks, and Cardalis Pre Psy every 7 months. Most recently, Cardalis was updated on October 29, 2026 and Cardalis Pre Psy on September 28, 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.*