# Seconds Interval Timer vs Flextimer

The clearest difference is in-app purchases: Flextimer at none against Seconds Interval Timer's 1. Flextimer also leads on review sentiment (100% vs 75%) and rating (5.0 vs 4.7). Seconds Interval Timer's advantage is ratings volume (24K vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Seconds Interval Timer sells 1 one-off in-app purchase. Flextimer asks for nothing beyond the download.

Flextimer holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Seconds Interval Timer's written reviews are positive against 100% of Flextimer's.

Seconds Interval Timer ships an update monthly, Flextimer every 9 days. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Seconds Interval Timer | Flextimer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (24K ratings)](https://appshunter.io/ios/app/seconds-interval-timer/id475816966/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flextimer-design-your-time/id6763629801/reviews)** |
| Number of ratings | **24K** | 1 |
| Positive reviews | 74.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 95 MB | 56 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [SOPHOMATH LLC](https://appshunter.io/developer/1827142250) |

## 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


### Flextimer

[App page](https://appshunter.io/ios/app/flextimer-design-your-time/id6763629801)

Create custom interval timers for workouts, focus sessions, or daily routines. Design sessions step-by-step or use AI to generate them from plain text descriptions. Includes cues for sounds, vibration, and color changes.

**Highlights:** AI-generated timer creation from text, Customizable interval and round timers, Step cues for sound, vibration, and color, Timer Summary with detailed progress, Configurable run-screen controls, Saved custom timers and starting points

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Seconds Interval Timer free?

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

### Is Flextimer free?

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

### Which has better reviews, Seconds Interval Timer or Flextimer?

Flextimer is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while Flextimer averages 5.0 from 1 ratings.

### Do Seconds Interval Timer or Flextimer have ads?

Neither Seconds Interval Timer nor Flextimer shows ads.

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

Seconds Interval Timer ships an update monthly, and Flextimer every 9 days. Most recently, Seconds Interval Timer was updated on October 15, 2026 and Flextimer on October 2, 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.*