# GymNext Flex Timer vs 507FAST

The clearest difference is in-app purchases: 507FAST at none against GymNext Flex Timer's 2. GymNext Flex Timer's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 14 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. GymNext Flex Timer sells 2 in-app purchases, starting at $8.99 per month. 507FAST asks for nothing beyond the download.

GymNext Flex Timer ships an update every 3 weeks, 507FAST every 14 months. The most recent releases landed on October 13, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | GymNext Flex Timer | 507FAST |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.1K ratings)](https://appshunter.io/ios/app/gymnext-flex-timer/id977329344/reviews)** | — |
| Number of ratings | **2.1K** | — |
| Positive reviews | 71.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 14 months |
| Monetization | Free | — |
| Size | 185 MB | 91 MB |
| Requires iOS | 15.0 | 15 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Homick Enterprises](https://appshunter.io/developer/346326303) | [PushPress, Inc.](https://appshunter.io/developer/688595778) |

## 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


### 507FAST

[App page](https://appshunter.io/ios/app/507fast/id6475751692)

**Features:** macOS Compatibility, Apple Wallet

**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 507FAST free?

507FAST is free to download, with no in-app purchases.

### Do GymNext Flex Timer or 507FAST have ads?

507FAST shows ads; GymNext Flex Timer does not.

### Which is updated more often, GymNext Flex Timer or 507FAST?

GymNext Flex Timer ships an update every 3 weeks, and 507FAST every 14 months. Most recently, GymNext Flex Timer was updated on October 13, 2026 and 507FAST on September 22, 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.*