Frez: Isometric Training
Donghyun Kim Health & Fitness iPhoneiPadiPod touchApple Watch
Frez: Isometric Training is a free Health & Fitness app for iPhone and iPad by Donghyun Kim. Rated 4.7/5 from 27 ratings. Requires iOS 15.0.
- Rating
- 4.7
- 27 ratings
- Price
- Free
- on the App Store
- Size
- 120 MB
- Age 4+
- Updated
- Oct 4
- 2026 · v4.15.3
Screenshots
About Frez: Isometric Training
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
Ratings & reviews
4.7
27 ratings
What’s new
Version 4.15.3 · Updated October 4, 2026
[Improvements] * Fixed the Frez Dyno connection notification staying on screen after disconnecting.
App privacy
The developer, Donghyun Kim, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Diagnostics: Crash Data, Other Diagnostic Data
- Other Data: Other Data Types
- Contact Info: Email Address, Name
- User Content: Customer Support, Other User Content
- Identifiers: User ID
Used for: Analytics, App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Usage Data: Product Interaction, Other Usage Data
Used for: Analytics
Alternatives to Frez: Isometric Training
Looking for apps like Frez: Isometric Training? Here are 6 similar apps on the App Store. The highest rated is Intentional Climber (5.0/5), and all 6 are free to download.
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Hold Strong: Train Smarter
4.8
-
Force Board
3.8
-
Boardsesh
4.6
-
Intentional Climber
5.0
-
Climo - Climb Boulder Tracker
4.4
-
Get a Grip: Finger Training
5.0
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Frez: Isometric Training | 4.7 / 5 (27 ratings) | Free | October 4, 2026 | |
| Hold Strong: Train Smarter | 4.8 / 5 (5) | Free | Jun 12, 2026 | Compare |
| Force Board | 3.8 / 5 (16) | Free | Oct 6, 2026 | Compare |
| Boardsesh | 4.6 / 5 (28) | Free | Oct 15, 2026 | Compare |
| Intentional Climber | 5.0 / 5 (5) | Free | Oct 8, 2026 | Compare |
| Climo - Climb Boulder Tracker | 4.4 / 5 (16) | Free | Oct 5, 2026 | Compare |
| Get a Grip: Finger Training | 5.0 / 5 (4) | Free | Oct 5, 2026 | Compare |