# Seconds Pro Interval Timer vs FitGrid Pro

The clearest difference is review sentiment: Seconds Pro Interval Timer at 80% against FitGrid Pro's 0%. Seconds Pro Interval Timer also leads on rating (4.8 vs 3.6) and ratings volume (12K vs 21). FitGrid Pro's advantage is price (Free vs $7.99) and iOS requirement (15.6 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

FitGrid Pro 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 3.6. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 21, so its average is the more settled of the two. Written reviews point the same way: 80% of Seconds Pro Interval Timer's written reviews are positive against 0% of FitGrid Pro's.

Seconds Pro Interval Timer ships an update fortnightly, FitGrid Pro every 2 months. The most recent releases landed on September 24, 2026 and August 28, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | FitGrid Pro |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews)** | [3.6 (21 ratings)](https://appshunter.io/ios/app/fitgrid-pro-for-instructors/id1209610909/reviews) |
| Number of ratings | **12K** | 21 |
| Positive reviews | **79.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#10** | — |
| Size | 94 MB | 43 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [YourGuru](https://appshunter.io/developer/1204865342) |

## What reviewers say

### Seconds Pro Interval Timer

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

**Currently charting:** #10 Top Paid · Health & Fitness (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


### FitGrid Pro

[App page](https://appshunter.io/ios/app/fitgrid-pro-for-instructors/id1209610909)

This app helps fitness instructors connect with their clients, offering personalized communication and feedback. It provides insights to encourage client loyalty and repeat visits to studios.

**Highlights:** Personalized client communication, Actionable insights for instructors, Direct client feedback collection, Community engagement tools, Encourages client loyalty

**Features:** 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 FitGrid Pro free?

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

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

Seconds Pro Interval Timer is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while FitGrid Pro averages 3.6 from 21 ratings.

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

Neither Seconds Pro Interval Timer nor FitGrid Pro shows ads.

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

Seconds Pro Interval Timer ships an update fortnightly, and FitGrid Pro every 2 months. Most recently, Seconds Pro Interval Timer was updated on September 24, 2026 and FitGrid Pro on August 28, 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.*