# Seconds Pro Interval Timer vs ClassFit

The clearest difference is price: ClassFit at Free against Seconds Pro Interval Timer's $7.99. ClassFit also leads on iOS requirement (15.6.1 vs 18.0). Seconds Pro Interval Timer's advantage is rating (4.8 vs 4.0) and ratings volume (12K vs 2). On update cadence, ads, in-app purchases and device support there is nothing between them.

ClassFit is free to download; Seconds Pro Interval Timer costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Seconds Pro Interval Timer holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 2, so its average is the more settled of the two.

Seconds Pro Interval Timer ships an update fortnightly, ClassFit every 3 weeks. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | ClassFit |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/classfit/id6461457409/reviews) |
| Number of ratings | **12K** | 2 |
| Positive reviews | 79.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Paid | **Free** |
| Best chart rank | **#8** | — |
| Size | 98 MB | 92 MB |
| Requires iOS | 18.0 | **15.6.1** |
| 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 Pro Interval Timer

[App page](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811)

**Currently charting:** #8 Top Paid · Health & Fitness, #102 Top Paid (US App Store)

This interval timer app is designed for high-intensity interval training (HIIT), Tabata, and circuit training workouts. It features a large, color-coded display, customizable interval names, and background operation. It also integrates with Apple Health to track your fitness data.

**Highlights:** Full screen colored display, Templates for HIIT, Tabata, Circuit Training, Speaks interval names and provides warnings, Assign music per interval, Runs in background, Share interval timers, Apple Health integration

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

**In-app purchases:** none

**What reviewers like**

- ⭐ Great updates
- 🤖 Amazing voice prompts
- 👍 Easy to use
- 🎨 Highly customizable
- 🔧 Versatile for various workouts

**What reviewers complain about**

- 🐛 Occasional bugs and glitches
- 🔌 Music volume issues
- 🔍 Complicated setup for some features
- 🌐 Sync/sharing issues between devices
- 🔇 Inconsistent audio cues

**Reported bugs**

- Intervals randomly pausing or skipping
- Music volume issues when launching the app
- Inconsistent audio cues and countdown
- Sync issues between devices

**Requested features**

- Ability to lock Apple Watch screen
- Option to see more than just the next exercise
- Fractional time settings (e.g. 7.74 seconds)
- More voice/audio customization options
- Improved sync between iPhone and iPad


### ClassFit

[App page](https://appshunter.io/ios/app/classfit/id6461457409)

Discover and join fitness classes hosted on the platform. Manage your memberships and account settings conveniently within the app.

**Highlights:** Find and join classes, Manage memberships, Account settings management, Class discovery

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Seconds Pro Interval Timer free?

Seconds Pro Interval Timer costs $7.99, with no in-app purchases.

### Is ClassFit free?

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

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

Seconds Pro Interval Timer is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while ClassFit averages 4.0 from 2 ratings.

### Do Seconds Pro Interval Timer or ClassFit have ads?

Neither Seconds Pro Interval Timer nor ClassFit shows ads.

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

Seconds Pro Interval Timer ships an update fortnightly, and ClassFit every 3 weeks. Most recently, Seconds Pro Interval Timer was updated on November 10, 2026 and ClassFit on November 3, 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.*