Principled Fitness
Maximize your fitness outcomes
About
Visualize your workouts with a dynamic muscle map that highlights which muscles you've trained, missed, or partially worked. Log sets, track progress, and get personalized guidance for your fitness journey. Features include macro tracking, barcode scanning for food logging, and on-device form analysis.
What's New in Principled Fitness
3.2.0
August 6, 2026
The Glow. Your muscle map now reads the last 7 days instead of resetting every Monday — train Sunday, still lit Monday morning. And it works both ways: hit a muscle hard 4+ days in a week and it heats up. Optimized — rest extends the glow. Also in this release: • Strength trend, honest: your PR line with per-day best dots — no more confusing decay curve. • Burpees now credit your chest, and the kettlebell swing muscle map got corrected. Existing logs recount automatically. • If a save ever fails, you'll see a calm heads-up and nothing is lost. • Faster history and PR lookups on big logs.
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FAQ
What is Principled?
Principled is a health and fitness app that provides a visual muscle map to track your workouts and log your nutrition. It focuses on private, on-device data storage without requiring an account.
Does Principled have ads?
No, Principled is ad-free. It does not contain any advertisements or third-party ad SDKs, ensuring a private and uninterrupted user experience.
What devices does Principled support?
Principled is available for iPhone and Apple Watch. It requires iOS 17 or later.
How does Principled handle user data privacy?
Principled is private by default, with no account required. Your data is stored on your device, and you can export or erase it at any time. Apple Health integration is opt-in and data is only read for display or written back after workouts.
Can I track my nutrition with Principled?
Yes, Principled includes a 'Fuel' tab for tracking full macros against your targets. You can log meals via barcode scan, nutrition label scan, search, or manual entry.
What are the key features for workout tracking in Principled?
Key features include fast set logging with prefilled rows, automatic PR detection, a rest timer with Live Activity, and on-device form check for posture analysis.
How often is Principled updated?
The app was last updated on July 14, 2026, with version 3.0.0. This indicates active development and regular updates.
What is the user sentiment for Principled?
Based on the provided data, Principled has a perfect 5.0-star rating from 1 review, suggesting very positive initial user sentiment.