# GymNext Flex Timer vs Interval(x)

The clearest difference is in-app purchases: Interval(x) at none against GymNext Flex Timer's 2. Interval(x) also leads on rating (5.0 vs 4.8). GymNext Flex Timer's advantage is ratings volume (2.1K vs 1) and device support (4 vs 2). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. GymNext Flex Timer sells 2 in-app purchases, starting at $8.99 per month. Interval(x) asks for nothing beyond the download.

Interval(x) holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: GymNext Flex Timer has 2.1K ratings behind it against 1, so its average is the more settled of the two.

GymNext Flex Timer ships an update every 3 weeks, Interval(x) every 10 days. The most recent releases landed on September 22, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | GymNext Flex Timer | Interval(x) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (2.1K ratings)](https://appshunter.io/ios/app/gymnext-flex-timer/id977329344/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/intervalx/id6739734149/reviews)** |
| Number of ratings | **2.1K** | 1 |
| Positive reviews | 72.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Monetization | Free | Free |
| Size | 185 MB | 2 MB |
| Requires iOS | **15.0** | 18.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Homick Enterprises](https://appshunter.io/developer/346326303) | [ShapeHaven Innovations LLC](https://appshunter.io/developer/1747127977) |

## What reviewers say

### GymNext Flex Timer

[App page](https://appshunter.io/ios/app/gymnext-flex-timer/id977329344)

This app offers advanced interval training timing with customizable modes and the ability to control an external LED display. It integrates with wearables and heart rate monitors for a comprehensive workout experience.

**Highlights:** Control external LED displays, Multiple customizable timer modes (Tabata, EMOM, etc.), Save and recall favorite workouts, Apple Watch control, Audio sync with music, Heart rate monitor integration, Control multiple LED displays

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Flex Timer Pro Monthly | $8.99 | per month |
| Flex Timer Pro Yearly | $79.99 | per year |

**What reviewers like**

- 🚀 Versatile and customizable
- 👍 User-friendly interface
- 🔔 Reliable and consistent
- 💪 Excellent for interval training
- 🔊 Clear audio cues

**What reviewers complain about**

- 🐛 Audio cues sometimes stop working
- 🔊 Lack of volume control
- 🔍 Detailed instructions needed for beginners
- ⏱️ Delayed countdown between phone and timer

**Reported bugs**

- Saved timers not consistently loading
- Segmented timers not saving properly

**Requested features**

- Watch app integration for remote control
- Background audio playback when app is closed
- Customizable voice options
- Lap timer functionality


### Interval(x)

[App page](https://appshunter.io/ios/app/intervalx/id6739734149)

An open-source interval timer designed for precision and privacy. Configure work and rest periods with millisecond accuracy for training or daily routines. It offers a transparent, data-free experience for users who value control and simplicity.

**Highlights:** Open Source Transparency, Zero Data Collection, Millisecond Interval Precision, Customizable Work/Rest Periods, Lightweight and Power-Efficient, Privacy-First Design

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is GymNext Flex Timer free?

GymNext Flex Timer is free to download, with in-app purchases available.

### Is Interval(x) free?

Interval(x) is free to download, with no in-app purchases.

### Which has better reviews, GymNext Flex Timer or Interval(x)?

Interval(x) is rated higher. GymNext Flex Timer averages 4.8 out of 5 from 2.1K ratings, while Interval(x) averages 5.0 from 1 ratings.

### Do GymNext Flex Timer or Interval(x) have ads?

Neither GymNext Flex Timer nor Interval(x) shows ads.

### Which is updated more often, GymNext Flex Timer or Interval(x)?

GymNext Flex Timer ships an update every 3 weeks, and Interval(x) every 10 days. Most recently, GymNext Flex Timer was updated on September 22, 2026 and Interval(x) on September 18, 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.*