Reading guide
Get things done in Atomic Fast
Follow practical guides to starting a fast, editing sessions, logging food and reusing meals on iOS and Android.
Your fasting timer
Learn the controls and what the timer’s educational phase labels mean.
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How to Start Your First Fast in Atomic Fast
Start your first fast in Atomic Fast on iPhone or Android: choose a goal, read the timer, end the session and save a record you can find again in your history.
5 min read -
How to Edit Fasting Times in Atomic Fast
Forgot to start or stop your fasting timer? Correct an active fast, edit a saved session, or record a missing fast in Atomic Fast on iPhone and Android.
7 min read -
How the Atomic Fast Timer Shows Your Metabolic Phase
What Atomic Fast’s timer and phase labels actually show: elapsed time, fixed hour bands and a separate meal estimate, with clear limits on what they can tell you.
4 min read
Meals and records
Choose a logging method, reuse meals and understand how fasting and food records fit together.
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How to Log a Meal in Atomic Fast
Log your first meal in Atomic Fast on iPhone or Android. Choose a photo, description, barcode or food search, check the portions and time, then save your entry.
8 min read -
Save and Reuse Meals in Atomic Fast
Save a familiar meal in Atomic Fast, find it in My Meals, check the portions and log it again. Follow the iPhone and Android steps without taking another food photo.
7 min read -
Why Pair a Fasting Timer With a Food Log?
A timer records when you eat; a food log adds what you recorded. See how Atomic Fast pairs them, where estimates fall short, and when tracking may not help.
5 min read -
Atomic Fast Cloud Backup and Data Export Explained
Back up Atomic Fast with iCloud on iOS or Google Drive on Android. Learn what is included, how restore works, and what CSV and JSON exports can and cannot do.
4 min read