# GymNext Flex Timer vs Zen Planner Staff App

The clearest difference is review sentiment: GymNext Flex Timer at 72% against Zen Planner Staff App's 16%. GymNext Flex Timer also leads on rating (4.8 vs 1.7) and update cadence (every 3 weeks vs every 3 months). Zen Planner Staff App's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.0). On price, ads, monetization model and device support there is nothing between them.

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

GymNext Flex Timer holds the better App Store score, 4.8 against 1.7. That said, the two scores are not equally well evidenced: GymNext Flex Timer has 2.1K ratings behind it against 91, so its average is the more settled of the two. Written reviews point the same way: 72% of GymNext Flex Timer's written reviews are positive against 16% of Zen Planner Staff App's.

GymNext Flex Timer ships an update every 3 weeks, Zen Planner Staff App every 3 months. The most recent releases landed on September 25, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | GymNext Flex Timer | Zen Planner Staff App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.1K ratings)](https://appshunter.io/ios/app/gymnext-flex-timer/id977329344/reviews)** | [1.7 (91 ratings)](https://appshunter.io/ios/app/zen-planner-staff-app/id1122645605/reviews) |
| Number of ratings | **2.1K** | 91 |
| Positive reviews | **72.4% of reviews** | 15.6% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free | Free |
| Size | 185 MB | 14 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Homick Enterprises](https://appshunter.io/developer/346326303) | [Daxko LLC](https://appshunter.io/developer/633678240) |

## 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


### Zen Planner Staff App

[App page](https://appshunter.io/ios/app/zen-planner-staff-app/id1122645605)

Manage your fitness business operations remotely. This app allows staff to view schedules, check-in clients, manage appointments, process payments, and update customer information. It's designed for businesses already using the Zen Planner platform.

**Highlights:** View full business schedule, Check class capacity, Check clients into sessions, Schedule and edit appointments, Sell drop-ins, Process payments, Manage customer profiles

**Features:** 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 Zen Planner Staff App free?

Zen Planner Staff App is free to download, with no in-app purchases.

### Which has better reviews, GymNext Flex Timer or Zen Planner Staff App?

GymNext Flex Timer is rated higher. GymNext Flex Timer averages 4.8 out of 5 from 2.1K ratings, while Zen Planner Staff App averages 1.7 from 91 ratings.

### Do GymNext Flex Timer or Zen Planner Staff App have ads?

Neither GymNext Flex Timer nor Zen Planner Staff App shows ads.

### Which is updated more often, GymNext Flex Timer or Zen Planner Staff App?

GymNext Flex Timer ships an update every 3 weeks, and Zen Planner Staff App every 3 months. Most recently, GymNext Flex Timer was updated on September 25, 2026 and Zen Planner Staff App on August 12, 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.*