# Interval Timer Sec+Sec vs CatKai

The clearest difference is ads: CatKai at none against Interval Timer Sec+Sec's shown. Interval Timer Sec+Sec's advantage is iOS requirement (13 vs 26.2). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Interval Timer Sec+Sec sells 1 one-off in-app purchase and CatKai sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Interval Timer Sec+Sec | CatKai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (13 ratings)](https://appshunter.io/ios/app/interval-timer-sec-plus-sec/id595618563/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | — |
| Monetization | Ad-supported | — |
| Size | 12 MB | 2 MB |
| Requires iOS | **13** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Luca Ramseyer](https://appshunter.io/developer/1886570279) |

## What reviewers say

### Interval Timer Sec+Sec

[App page](https://appshunter.io/ios/app/interval-timer-sec-plus-sec/id595618563)

This free interval training timer app uses alarms and vibrations to mark specified second intervals. It automatically tracks repetitions and remembers your settings, making it ideal for High Intensity Interval Training (HIIT). Background operation is limited.

**Highlights:** Second-based interval timing, Alarm and vibration alerts, Repetition counter, Saves interval settings, Suitable for HIIT, Background operation limited

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### CatKai

[App page](https://appshunter.io/ios/app/catkai-kitten-calculator/id6760860197)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Breeder Mode Monthly Subscription | $0.99 | per month |
| Breeder Mode Yearly Subscription | $9.99 | per year |


## Frequently asked questions

### Is Interval Timer Sec+Sec free?

Interval Timer Sec+Sec is free to download, with in-app purchases available.

### Is CatKai free?

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

### Do Interval Timer Sec+Sec or CatKai have ads?

Interval Timer Sec+Sec shows ads; CatKai does not.

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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.*