# GymNext Flex Timer vs Spark Kiosk

The clearest difference is in-app purchases: Spark Kiosk at none against GymNext Flex Timer's 2. Spark Kiosk also leads on iOS requirement (13.0 vs 15.0). GymNext Flex Timer's advantage is ratings volume (2.2K vs 34) and device support (4 vs 1). On price, rating, review sentiment and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.8 for GymNext Flex Timer against 4.7 for Spark Kiosk. That said, the two scores are not equally well evidenced: GymNext Flex Timer has 2.2K ratings behind it against 34, so its average is the more settled of the two. Written reviews are what separate them: 72% of GymNext Flex Timer's written reviews are positive against 67% of Spark Kiosk's.

GymNext Flex Timer ships an update every 3 weeks, Spark Kiosk monthly. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | GymNext Flex Timer | Spark Kiosk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.2K ratings)](https://appshunter.io/ios/app/gymnext-flex-timer/id977329344/reviews)** | [4.7 (34 ratings)](https://appshunter.io/ios/app/spark-kiosk/id1448107942/reviews) |
| Number of ratings | **2.2K** | 34 |
| Positive reviews | **71.7% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 185 MB | 82 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPad |
| Age rating | 4+ | 9+ |
| Developer | [Homick Enterprises](https://appshunter.io/developer/346326303) | [Spark Membership LLC](https://appshunter.io/developer/1448107941) |

## 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


### Spark Kiosk

[App page](https://appshunter.io/ios/app/spark-kiosk/id1448107942)

This app transforms an iPad into a dedicated attendance management system. It allows students to quickly check in and view important announcements. Instructors can manage rosters, attendance, and student information securely.

**Highlights:** Student check-in, Event announcements, Light/Dark mode, Instructor Mode for management, Roster and attendance tracking, Guardian notifications, Student profile picture uploads

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

**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 Spark Kiosk free?

Spark Kiosk is free to download, with no in-app purchases.

### Which has better reviews, GymNext Flex Timer or Spark Kiosk?

GymNext Flex Timer is rated higher. GymNext Flex Timer averages 4.8 out of 5 from 2.2K ratings, while Spark Kiosk averages 4.7 from 34 ratings.

### Do GymNext Flex Timer or Spark Kiosk have ads?

Neither GymNext Flex Timer nor Spark Kiosk shows ads.

### Which is updated more often, GymNext Flex Timer or Spark Kiosk?

GymNext Flex Timer ships an update every 3 weeks, and Spark Kiosk monthly. Most recently, GymNext Flex Timer was updated on October 20, 2026 and Spark Kiosk on October 10, 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.*