# Seconds Interval Timer vs Simple Circuit Interval Timer

The clearest difference is review sentiment: Simple Circuit Interval Timer at 100% against Seconds Interval Timer's 75%. Simple Circuit Interval Timer also leads on update cadence (every 5 days vs monthly) and iOS requirement (10.0 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Seconds Interval Timer sells 1 one-off in-app purchase and Simple Circuit Interval Timer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Seconds Interval Timer ships an update monthly, Simple Circuit Interval Timer every 5 days. The most recent releases landed on October 17, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Seconds Interval Timer | Simple Circuit Interval Timer |
| --- | --- | --- |
| 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 | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 95 MB | 113 MB |
| Requires iOS | 18.0 | **10.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [Timothy Shepherd](https://appshunter.io/developer/1479749822) |

## 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


### Simple Circuit Interval Timer

[App page](https://appshunter.io/ios/app/simple-circuit-interval-timer/id1505323062)

This app provides customizable interval timers for HIIT, circuit training, and yoga. It also features a daily plank challenge to build core strength at home without equipment. Enjoy stunning visuals and offline workout capabilities.

**Highlights:** Customizable interval timers, HIIT, circuit, and Tabata support, Daily plank challenge, Offline workout capability, Customizable themes and layouts, REP meter for pace tracking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Simple Circuit Trainer: Pro | $1.99 | one-time |


## Frequently asked questions

### Is Seconds Interval Timer free?

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

### Is Simple Circuit Interval Timer free?

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

### Do Seconds Interval Timer or Simple Circuit Interval Timer have ads?

Neither Seconds Interval Timer nor Simple Circuit Interval Timer shows ads.

### Which is updated more often, Seconds Interval Timer or Simple Circuit Interval Timer?

Seconds Interval Timer ships an update monthly, and Simple Circuit Interval Timer every 5 days. Most recently, Seconds Interval Timer was updated on October 17, 2026 and Simple Circuit Interval Timer on October 4, 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.*