Nightmare Muscle
Nightmare Muscle LLC Health & Fitness iPhoneiPadiPod touch
Nightmare Muscle is a free Health & Fitness app for iPhone and iPad by Nightmare Muscle LLC. Requires iOS 13.5. Updated September 26, 2025.
- Price
- Free
- on the App Store
- Size
- 14 MB
- Age 4+
- Updated
- Sep 26
- 2025 · v8.4.6
Screenshots
About Nightmare Muscle
Download the Nightmare Muscle app to easily book classes and manage your fitness experience - anytime, anywhere. Make a reservation, get added to a wait list, purchase class packages, check your profile and membership status, keep up to date with the latest products and services, and more – all from your device. Visit http://nightmaremuscle.com to learn more.
What’s new
Version 8.4.6 · Updated September 26, 2025
Quicker bookings, frictionless login, and powerful branding - this update has it all. You can book your favorite class 33% faster than before with the new quick-booking feature. Even logging into the app is faster with support for biometric login using a fingerprint or a face scan. Do it all fully immersed in your studio’s brand. We've made some minor bug fixes and user experience improvements.
App privacy
The developer, Nightmare Muscle LLC, 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:
- Contact Info: Email Address, Name, Phone Number, Other User Contact Info
- Identifiers: Device ID
- Usage Data: Other Usage Data
- Sensitive Info: Sensitive Info
- Diagnostics: Performance Data, Crash Data, Other Diagnostic Data
Used for: Analytics, Product Personalization, App Functionality, Other Purposes
Alternatives to Nightmare Muscle
Looking for apps like Nightmare Muscle? Here are 6 similar apps on the App Store. The highest rated is Iron Addiction (5.0/5), and all 6 are free to download.
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Iron Addiction Gym
-
Urijah Faber's UltimateFitness
4.9
-
Fitness System Member App
-
Iron Addiction
5.0
-
Union WELL Connect
2.8
-
Punch King Fitness
| App | Rating | Price | Last updated |
|---|---|---|---|
| Nightmare Muscle | – | Free | September 26, 2025 |
| Iron Addiction Gym | – | Free | Nov 10, 2025 |
| Urijah Faber's UltimateFitness | 4.9 / 5 (12) | Free | Sep 8, 2026 |
| Fitness System Member App | – | Free | Nov 19, 2024 |
| Iron Addiction | 5.0 / 5 (44) | Free | Apr 1, 2026 |
| Union WELL Connect | 2.8 / 5 (16) | Free | Mar 17, 2025 |
| Punch King Fitness | – | Free | Jun 4, 2026 |