# Interval Timer Pro vs GymNext Flex Timer

The clearest difference is price: GymNext Flex Timer at Free against Interval Timer Pro's $2.99. GymNext Flex Timer also leads on update cadence (every 3 weeks vs every 3 months) and rating (4.8 vs 4.5). Interval Timer Pro's advantage is in-app purchases (none vs 2) and chart position (#104 vs unranked). On review sentiment, ads, monetization model and device support there is nothing between them.

GymNext Flex Timer is free to download; Interval Timer Pro costs $2.99 up front. GymNext Flex Timer sells 2 in-app purchases, starting at $8.99 per month. Interval Timer Pro asks for nothing beyond the download.

GymNext Flex Timer holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 598 and 2.1K respectively. Written reviews complicate that: 75% of Interval Timer Pro's written reviews are positive against 72% of GymNext Flex Timer's, so the app with the better star average is not the one people write more warmly about.

Interval Timer Pro ships an update every 3 months, GymNext Flex Timer every 3 weeks. The most recent releases landed on September 29, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Interval Timer Pro | GymNext Flex Timer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.5 (598 ratings)](https://appshunter.io/ios/app/interval-timer-pro/id395652793/reviews) | **[4.8 (2.1K ratings)](https://appshunter.io/ios/app/gymnext-flex-timer/id977329344/reviews)** |
| Number of ratings | 598 | **2.1K** |
| Positive reviews | **75.2% of reviews** | 72.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Best chart rank | **#104** | — |
| Size | 25 MB | 185 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Beesoft Apps](https://appshunter.io/developer/1420966143) | [Homick Enterprises](https://appshunter.io/developer/346326303) |

## What reviewers say

### Interval Timer Pro

[App page](https://appshunter.io/ios/app/interval-timer-pro/id395652793)

**Currently charting:** #104 Top Paid · Health & Fitness (US App Store)

This app helps you manage work and rest periods for various fitness activities. It offers customizable intervals, runs in the background, and allows you to play music during workouts. Save your settings and share your progress.

**Highlights:** Customizable sets and intervals, Background operation, Music playback, Save settings as templates, Post-workout sharing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💪 Excellent for interval training
- 🎨 Customizable workouts
- 🎶 Integrates with music
- ⏱️ Reliable timer
- 📊 Tracks workout history

**What reviewers complain about**

- 🐛 Bugs with screen orientation and audio
- 🔄 No ability to reorder intervals
- 📤 No workout sharing or syncing
- 🔒 Lack of customization options
- 💰 Paid version offers limited additional features

**Reported bugs**

- App freezes when adjusting number of sets
- Timer stops working when switching apps
- Paid version doesn't import free version workouts

**Requested features**

- Apple Watch integration
- Countdown timer before interval ends
- Ability to import/export workout routines
- More sound effect options
- Ability to see upcoming interval


### 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


## Frequently asked questions

### Is Interval Timer Pro free?

Interval Timer Pro costs $2.99, with no in-app purchases.

### Is GymNext Flex Timer free?

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

### Which has better reviews, Interval Timer Pro or GymNext Flex Timer?

GymNext Flex Timer is rated higher. Interval Timer Pro averages 4.5 out of 5 from 598 ratings, while GymNext Flex Timer averages 4.8 from 2.1K ratings.

### Do Interval Timer Pro or GymNext Flex Timer have ads?

Neither Interval Timer Pro nor GymNext Flex Timer shows ads.

### Which is updated more often, Interval Timer Pro or GymNext Flex Timer?

Interval Timer Pro ships an update every 3 months, and GymNext Flex Timer every 3 weeks. Most recently, Interval Timer Pro was updated on September 29, 2026 and GymNext Flex Timer on September 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.*