# Seconds Interval Timer vs ClassFit for Business

The clearest difference is rating: Seconds Interval Timer at 4.7 against ClassFit for Business's 2.0. Seconds Interval Timer also leads on review sentiment (75% vs 35%) and ratings volume (24K vs 7). ClassFit for Business's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

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

Seconds Interval Timer holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 7, 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 35% of ClassFit for Business's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 17, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Seconds Interval Timer | ClassFit for Business |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (24K ratings)](https://appshunter.io/ios/app/seconds-interval-timer/id475816966/reviews)** | [2.0 (7 ratings)](https://appshunter.io/ios/app/classfit-for-business/id1400691253/reviews) |
| Number of ratings | **24K** | 7 |
| Positive reviews | **74.6% of reviews** | 35.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 95 MB | 71 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [FastPlay Ltd.](https://appshunter.io/developer/995838392) |

## 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


### ClassFit for Business

[App page](https://appshunter.io/ios/app/classfit-for-business/id1400691253)

This app helps organizers manage classes, track customer information, and process payments efficiently. It streamlines administrative tasks for fitness professionals and class providers.

**Highlights:** Class management, Customer tracking, Payment processing, Streamlined administration

**Features:** Apple Wallet, 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 ClassFit for Business free?

ClassFit for Business is free to download, with no in-app purchases.

### Which has better reviews, Seconds Interval Timer or ClassFit for Business?

Seconds Interval Timer is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while ClassFit for Business averages 2.0 from 7 ratings.

### Do Seconds Interval Timer or ClassFit for Business have ads?

Neither Seconds Interval Timer nor ClassFit for Business shows ads.

### Which is updated more often, Seconds Interval Timer or ClassFit for Business?

Seconds Interval Timer ships an update monthly, and ClassFit for Business monthly. Most recently, Seconds Interval Timer was updated on October 17, 2026 and ClassFit for Business 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.*