# Seconds Pro Interval Timer vs SYNC GO

The clearest difference is price: SYNC GO at Free against Seconds Pro Interval Timer's $7.99. SYNC GO also leads on iOS requirement (14.0 vs 18.0). Seconds Pro Interval Timer's advantage is update cadence (fortnightly vs every 4 months) and rating (4.8 vs 4.4). On ads, in-app purchases and device support there is nothing between them.

SYNC GO 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 4.4. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 39, 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 67% of SYNC GO's.

Seconds Pro Interval Timer ships an update fortnightly, SYNC GO every 4 months. The most recent releases landed on September 24, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Seconds Pro Interval Timer | SYNC GO |
| --- | --- | --- |
| Price | $7.99 | **Free** |
| Rating | **[4.8 (12K ratings)](https://appshunter.io/ios/app/seconds-pro-interval-timer/id363978811/reviews)** | [4.4 (39 ratings)](https://appshunter.io/ios/app/sync-go/id1404696486/reviews) |
| Number of ratings | **12K** | 39 |
| Positive reviews | **79.9% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#10** | — |
| Size | 94 MB | 51 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Runloop Ltd](https://appshunter.io/developer/325563420) | [Zumba® Fitness](https://appshunter.io/developer/628664480) |

## 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


### SYNC GO

[App page](https://appshunter.io/ios/app/sync-go/id1404696486)

This app is an all-in-one tool for creating music playlists for fitness classes. It allows instructors to access monthly music and video content, trim songs, and make playlists available offline. It also provides access to teaching aids and syncs content from a previous platform.

**Highlights:** Music playlist creation, Trim songs to custom lengths, Offline playlist access, Access to monthly music/video content, Syncs with SYNC Now, Access to teaching aids

**Features:** macOS Compatibility, 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 SYNC GO free?

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

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

Seconds Pro Interval Timer is rated higher. Seconds Pro Interval Timer averages 4.8 out of 5 from 12K ratings, while SYNC GO averages 4.4 from 39 ratings.

### Do Seconds Pro Interval Timer or SYNC GO have ads?

Neither Seconds Pro Interval Timer nor SYNC GO shows ads.

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

Seconds Pro Interval Timer ships an update fortnightly, and SYNC GO every 4 months. Most recently, Seconds Pro Interval Timer was updated on September 24, 2026 and SYNC GO on August 16, 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.*