# Lets Events Checkin vs CardioInterv

The clearest difference is update cadence: CardioInterv at every 3 days against Lets Events Checkin's every 5 weeks. CardioInterv also leads on iOS requirement (14.0.0 vs 16.0). 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.

Lets Events Checkin ships an update every 5 weeks, CardioInterv every 3 days. The most recent releases landed on November 6, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Lets Events Checkin | CardioInterv |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Size | 38 MB | 35 MB |
| Requires iOS | 16.0 | **14.0.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [LETS SOFTWARE LTDA](https://appshunter.io/developer/933931987) | [Scitech Produtos Medicos SA](https://appshunter.io/developer/1700271694) |

## What reviewers say

### Lets Events Checkin

[App page](https://appshunter.io/ios/app/lets-events-checkin/id933931988)

**In-app purchases:** none


### CardioInterv

[App page](https://appshunter.io/ios/app/cardiointerv/id6754330317)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lets Events Checkin free?

Lets Events Checkin is free to download, with no in-app purchases.

### Is CardioInterv free?

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

### Do Lets Events Checkin or CardioInterv have ads?

Neither Lets Events Checkin nor CardioInterv shows ads.

### Which is updated more often, Lets Events Checkin or CardioInterv?

Lets Events Checkin ships an update every 5 weeks, and CardioInterv every 3 days. Most recently, Lets Events Checkin was updated on November 6, 2026 and CardioInterv on October 16, 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.*