# Frez: Isometric Training — formerly ClimbHarder

> Isometric training app with real-time force tracking and custom routines. (iPhone/iPad app by Donghyun Kim.)

- Source: https://appshunter.io/ios/app/frez-isometric-training/id6730120024 (this page in markdown: same URL + `.md`)
- Developer: [Donghyun Kim](https://appshunter.io/developer/1669856479)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Rating: 4.90/5 from 26 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 116 MB
- Languages: Korean, Dutch, German (Germany), Norwegian Bokmål, European Spanish, American English, Italian, Japanese, Chinese (Simplified, China), Czech and 2 more
- Released: 2024-10-03
- Data updated: 2026-08-23
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/frez-isometric-training/id6730120024/reviews.md

## What is Frez?

Frez (formerly ClimbHarder): Train Without Moving. Improve With Data.

Frez helps you train smarter with isometric workouts. Whether you’re a climber, athlete, Frez gives you real-time feedback and structured routines based on your performance.

Real-time Force Tracking
• Visualize your force output live through Bluetooth-connected crane scales. Know exactly how hard you’re pulling — and how long you can hold it.

Peak & Endurance Tests
• Measure your Maximum Voluntary Contraction (MVC) or hold a force over time. Frez records every detail, so you can track your gains and compare sessions.

Custom Routines
• Build and follow your own isometric training routines — with full control over reps, sets, rest time, and target force.

Offline Mode
• No signal in the gym? No problem. Frez works even when you’re offline.

Frez supports your strength journey — one pull at a time.

= Frez service access permissions
Frez uses minimal device permissions, and we'll explain why.

= [Optional] Bluetooth permissions
We need Bluetooth permissions to connect with force measurement devices.


Subscription Terms:


Payment will be charged to the credit card connected to your Apple account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current subscription period. Your account will be charged for renewal within 24 hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and turn off auto-renewal by going to your Account Settings after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/


Read more about our terms and conditions here:

Privacy Policy: https://frez.app/privacy
Terms of Service: https://frez.app/terms

## Key features

- Real-time force tracking
- Peak and endurance tests
- Customizable workout routines
- Offline mode
- Bluetooth device connectivity
- Performance data visualization

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Training Tools (Yearly) | $29.99 | per year |
| Training Tools (Yearly) | $29.99 | per year |
| Training Tools (Monthly) | $4.99 | per month |
| Training Tools (Monthly) | $3.99 | per month |
| Training Tools (Yearly) | $24.99 | per year |
| ClimbHarder Premium (Yearly) | $29.99 | per year |
| ClimbHarder Premium (Monthly) | $4.99 | per month |
| ClimbHarder Premium (Yearly) | $29.99 | per year |
| Training Tools (Monthly) | $3.99 | per month |
| Training Tools (Yearly) | $19.99 | per year |
| ClimbHarder Premium (Monthly) | $2.99 | per month |
| ClimbHarder Premium (Yearly) | $23.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| ClimbHarder Training Tools | $89.99 | one-time |
| ClimbHarder Training Tools | $29.99 | one-time |
| ClimbHarder Training Tools | $119.99 | one-time |
| ClimbHarder Training Tools | $39.99 | one-time |


## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/frez-isometric-training/id6730120024/reviews.md

### 5/5 — Outstanding

*2025-10-25*

I’m using this to train primarily endurance for climbing. It’s so much better than the native Tindeq app. Well worth paying for.

**Developer response:** Thanks so much, Jperled!

We’re really happy to know you’ve found real value in Frez.
It means a lot to us that it’s been worth it for your climbing endurance training.
We’ll keep making it even better so you get the most out of every session.

If you ever have ideas or feedback, reach us anytime at support@frez.app or on Instagram @frez.app 💪

### 5/5 — Very useful

*2025-07-01, version 3.3.0*

Very cool alternative to tindeq progressor app! Lot of features and very proactive dev! I use it with WH-C06 scale and it works very well.

### 5/5 — Best of the best !

*2025-05-28, version 2.5.0*

Keep it up ! I like the app:)

### 5/5 — Limited experience review

*2025-05-19*

Love it so far!

**Developer response:** Hi, aconn91

Thank you so much for the kind words! 😊
We’re glad you’re enjoying it so far, and we hope it continues to be helpful for you.
If you have any feedback or ideas as you use the app more, feel free to share. we’re always working to improve!

### 5/5 — Great app

*2025-05-16*

Simple to use app for training

**Developer response:** Thanks, Linco12345!

Glad to hear you found the app simple to use - that’s exactly what we were aiming for.
Hope it helps with your training! 💪

## Frequently asked questions about Frez

### What is Frez?

Frez is a health and fitness application designed for isometric training. It provides real-time force feedback, allows users to track performance metrics, and build custom workout routines.

### Does Frez have ads?

No, Frez does not contain advertisements. The app is free to download and offers optional subscriptions for premium features.

### What devices does Frez support?

Frez is available on iPhone, iPad, and iPod. It requires Bluetooth connectivity to pair with compatible force measurement devices.

### How does Frez track force?

Frez utilizes Bluetooth-connected crane scales to visualize your force output in real-time. This allows for precise measurement of how hard you are pulling and for how long.

### Can I create my own workouts in Frez?

Yes, Frez allows you to build and follow custom isometric training routines. You have full control over reps, sets, rest time, and target force for each exercise.

### What are the subscription options for Frez?

Frez offers several subscription plans, including 'ClimbHarder Premium' and 'Training Tools', with monthly pricing options. Some plans include a free trial period.

### How often is Frez updated?

The latest version of Frez is 4.2.4, last updated on March 14, 2026. Updates typically focus on improving features and performance.

### Is Frez suitable for beginners?

Frez is designed for athletes and climbers looking to improve strength. Its structured routines and data feedback can benefit users of various experience levels interested in isometric training.

## Version history (last 5 releases)

### 4.11.1 — 2026-08-22

[Improvements]
* Downloaded programs now default to alternating hands and clearly show which hand measurements are needed.
* Critical Force details now consistently use your selected force unit.

### 4.11.0 — 2026-08-14

[New Features]
* Choose whether to alternate hands and set the hand-switch preparation time when starting the standalone timer.

[Improvements]
* Bulk edit ratios are now shown as percentages for clearer workout setup.

### 4.10.0 — 2026-08-06

[New Features]
* Select or clear all sets at once while using bulk edit.
* Choose whether heart rate is displayed during training.

[Improvements]
* Frez Dyno sessions now recover more reliably when measurements stall or Bluetooth disconnects.

### 4.9.4 — 2026-07-21

[New Features]
* Added an option to display incoming force readings as absolute values.

[Improvements]
* Peak, MVC, CF, and RFD grip assessment CSV exports now include measurement data reliably.

### 4.9.3 — 2026-06-13

[New Features]
* Added an onboarding experiment that introduces Frez with a quick interactive strength demo.

[Improvements]
* Improved onboarding layout reliability on devices with notches and home indicators.

## Apps similar to Frez

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Climo - Climb Tracker, Boulder](https://appshunter.io/ios/app/climo-climb-tracker-boulder/id6752956533) | 4.4 (10) | Free | Health & Fitness |
| [Hold Strong: Train Smarter](https://appshunter.io/ios/app/hold-strong-train-smarter/id6738137196) | 4.8 (5) | Free | Health & Fitness |
| [Climb Strong Coaching Hub](https://appshunter.io/ios/app/climb-strong-coaching-hub/id6593660779) | 4.6 (5) | Free | Health & Fitness |
| [Force Board](https://appshunter.io/ios/app/force-board/id1575849276) | 3.8 (16) | Free | Health & Fitness |
| [Woods Board](https://appshunter.io/ios/app/woods-board/id1619846872) | — | Free | Health & Fitness |
| [Tindeq Progressor](https://appshunter.io/ios/app/tindeq-progressor/id1380412428) | 3.7 (36) | Free | Health & Fitness |

## More apps by Donghyun Kim

- [WIC](https://appshunter.io/ios/app/wic/id1669856476)
- [오클고 - 클라이밍 기록, 암장 정보](https://appshunter.io/ios/app/id6479561592)

All apps by Donghyun Kim: https://appshunter.io/developer/1669856479

## Related topics

[idometrics](https://appshunter.io/ios/topics/idometrics) · [isometric workout](https://appshunter.io/ios/topics/isometric-workout) · [isometric exercise](https://appshunter.io/ios/topics/isometric-exercise) · [isometric](https://appshunter.io/ios/topics/isometric)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*