# Seconds Pro Interval Timer vs Klasik Fit, LLC

Seconds Pro Interval Timer and Klasik Fit, LLC both sit at 4.8 stars, but that hides the real split: 80% of Seconds Pro Interval Timer's written reviews are positive against 33% of Klasik Fit, LLC's. Seconds Pro Interval Timer also leads on ratings volume (12K vs 27) and update cadence (fortnightly vs every 6 weeks). Klasik Fit, LLC's advantage is price (Free vs $7.99) and iOS requirement (15.5 vs 18.0). On rating, ads, in-app purchases and device support there is nothing between them.

Klasik Fit, LLC 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.

On the App Store both sit at effectively the same score — 4.8 for Seconds Pro Interval Timer against 4.6 for Klasik Fit, LLC. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 27, so its average is the more settled of the two. Written reviews are what separate them: 80% of Seconds Pro Interval Timer's written reviews are positive against 33% of Klasik Fit, LLC's.

Seconds Pro Interval Timer ships an update fortnightly, Klasik Fit, LLC every 6 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | Klasik Fit, LLC |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews)** | [4.6 (27 ratings)](https://appshunter.io/ios/app/klasik-fit-llc/id1554502970/reviews) |
| Number of ratings | **12K** | 27 |
| Positive reviews | **79.5% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Paid | **Free** |
| Best chart rank | **#8** | — |
| Size | 98 MB | 181 MB |
| Requires iOS | 18.0 | **15.5** |
| Devices | iPhone, iPad, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [Klasik Fit, LLC](https://appshunter.io/developer/1542120941) |

## 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, #84 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


### Klasik Fit, LLC

[App page](https://appshunter.io/ios/app/klasik-fit-llc/id1554502970)

Track workouts, meals, and body measurements with your personal trainer. Set goals, monitor progress, and stay motivated with real-time messaging and reminders. Connects with wearable devices for seamless data syncing.

**Highlights:** Workout and meal tracking, Progress monitoring, Goal setting, Real-time coach messaging, Body measurement tracking, Wearable device integration, Workout reminders

**Features:** Apple Wallet, Apple Watch app, 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 Klasik Fit, LLC free?

Klasik Fit, LLC is free to download, with no in-app purchases.

### Which has better reviews, Seconds Pro Interval Timer or Klasik Fit, LLC?

Seconds Pro Interval Timer is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while Klasik Fit, LLC averages 4.6 from 27 ratings.

### Do Seconds Pro Interval Timer or Klasik Fit, LLC have ads?

Neither Seconds Pro Interval Timer nor Klasik Fit, LLC shows ads.

### Which is updated more often, Seconds Pro Interval Timer or Klasik Fit, LLC?

Seconds Pro Interval Timer ships an update fortnightly, and Klasik Fit, LLC every 6 weeks. Most recently, Seconds Pro Interval Timer was updated on October 27, 2026 and Klasik Fit, LLC on October 25, 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.*