100 Days Locked In
Nicholas Hufnagel Health & Fitness iPhoneiPadiPod touch
100 Days Locked In is a free Health & Fitness app for iPhone and iPad by Nicholas Hufnagel. Rated 5.0/5 from 1 ratings. Requires iOS 26.0.
- Rating
- 5.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 26 MB
- Age 17+
- Updated
- Oct 6
- 2026 · v2.3
Screenshots
About 100 Days Locked In
100 Days Locked In helps you commit to a focused 100-day fitness challenge and track the daily habits that make the challenge work. Create your challenge, follow a structured training plan, and check off the essentials each day: workout, cardio, steps, macros, no alcohol, and progress check-ins. The app turns those habits into a daily score so you can see whether you are staying locked in. Progress tools help you log body weight, body fat, photos, notes, and consistency over time. Social features let you follow friends, join groups, view leaderboards, share Bam Cam progress photos, and keep accountability visible without making everything public. Built for small private groups, early fitness challenges, and anyone who wants a simple way to stay accountable for 100 straight days.
What’s new
Version 2.3 · Updated October 6, 2026
Added analytics for app tracking and testing.
App privacy
The developer, Nicholas Hufnagel, 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:
- Health & Fitness: Health, Fitness
- Contact Info: Email Address, Name
- User Content: Photos or Videos, Other User Content
- Identifiers: User ID
Used for: 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:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Other Usage Data
Used for: Analytics
Alternatives to 100 Days Locked In
Looking for apps like 100 Days Locked In? Here are 6 similar apps on the App Store. The highest rated is J Newtrition (5.0/5), and all 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| 100 Days Locked In | 5.0 / 5 (1 rating) | Free | October 6, 2026 | |
| J Newtrition | 5.0 / 5 (19) | Free | Oct 23, 2026 | Compare |
| Calkilo: AI Calorie Tracker | 4.8 / 5 (12) | Free | Sep 4, 2026 | Compare |
| 100-Day Habit Tracker | – | Free | Sep 19, 2025 | Compare |
| Calorie Food Counter Quantlife | 1.0 / 5 (1) | Free | Feb 4, 2025 | Compare |
| 90Fix: Self Improvement | 4.6 / 5 (17) | Free | Apr 5, 2026 | Compare |
| Panther Health | 3.5 / 5 (24) | Free | Sep 25, 2026 | Compare |
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