# Seconds Interval Timer vs Kronos Studio

The clearest difference is update cadence: Kronos Studio at every 2 days against Seconds Interval Timer's monthly. Kronos Studio also leads on iOS requirement (16.4 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Seconds Interval Timer sells 1 one-off in-app purchase and Kronos Studio sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Seconds Interval Timer ships an update monthly, Kronos Studio every 2 days. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Seconds Interval Timer | Kronos Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (24K ratings)](https://appshunter.io/ios/app/seconds-interval-timer/id475816966/reviews)** | — |
| Number of ratings | **24K** | — |
| Positive reviews | 74.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 95 MB | 97 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [Muller Labs LLC](https://appshunter.io/developer/1884923229) |

## What reviewers say

### Seconds Interval Timer

[App page](https://appshunter.io/ios/app/seconds-interval-timer/id475816966)

This app provides a versatile interval timer for various workout types like Tabata, HIIT, and circuit training. It features a clear, full-screen display, customizable alerts, and background operation. Users can also utilize a stopwatch and countdown timer, with integration for Apple Health.

**Highlights:** Full-screen colored display, Templates for HIIT, Tabata, Circuit Training, Voice and audio alerts, Music assignment per interval, Background operation, Apple Health integration, Stopwatch and countdown timer

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Version | $7.99 | one-time |

**What reviewers like**

- 🚀 Great workout app
- 👍 Customizable and user-friendly
- 🔒 Reliable and stable
- 💡 Versatile for various workouts
- 👍 Easy to create and edit timers

**What reviewers complain about**

- 🐛 Occasional audio issues
- 🔍 Limited Apple Watch integration
- 💰 Paid version required for full functionality
- 🕰️ Time-consuming to set up complex workouts

**Reported bugs**

- Timer sometimes stops working unexpectedly
- Issues with restoring purchases on new devices

**Requested features**

- Ability to change beep/alert volume independently
- Option to delay transition between intervals
- Sync workouts across devices
- More preset workout templates
- Heart rate monitoring integration


### Kronos Studio

[App page](https://appshunter.io/ios/app/kronos-studio/id6762472031)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kronos Pro Monthly | $8.99 | per month |
| Kronos Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is Seconds Interval Timer free?

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

### Is Kronos Studio free?

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

### Do Seconds Interval Timer or Kronos Studio have ads?

Neither Seconds Interval Timer nor Kronos Studio shows ads.

### Which is updated more often, Seconds Interval Timer or Kronos Studio?

Seconds Interval Timer ships an update monthly, and Kronos Studio every 2 days. Most recently, Seconds Interval Timer was updated on October 13, 2026 and Kronos Studio on October 1, 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.*