Pure Fasting

Fasting, explained simply

Fast smarter. Feel more in control.

Hand-picked fasting apps and books, plus free guides, a timer and a planner for adults who want to understand fasting. Educational, not a clinic.

Shop our picksStart here, it’s free
Zero fasting app
The Complete Guide to FastingThe Obesity CodeFast Like a GirlFast This Way

Apps and books we point beginners to

📖 Plain guidesNo cure claims, no hype
📚 Bookshop.orgBooks that support indie shops
🆓 Free toolsQuiz, timer and planner
🔒 Safe checkoutYou buy on the seller’s own site

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Everything a beginner needs, in one place.

📱Fasting appsTrack fasts and meals📚Fasting booksFive reader favourites🧰Free toolsQuiz, timer, planner📖Beginner guides16:8, 18:6, drinks, hunger🎁Free starter guideRead or print it today

Fasting apps & tools

Track your fasts and meals on your phone.

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Zero fasting app

Fasting tracker

Zero fasting app

Time and log your fasting windows on your phone.

Try Zero →
Nutrinixy calorie tracker

Meal logger

Nutrinixy calorie tracker

Log meals by photo, voice or barcode in seconds.

Try Nutrinixy →

Best books on fasting

Worth a read if you want to go deeper. Talk to a doctor before changing how you eat.

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The Complete Guide to Fasting book cover

Book · Bookshop.org

The Complete Guide to Fasting

by Jason Fung with Jimmy Moore

A practical handbook on different ways to fast.

Buy now at Bookshop.org →
The Obesity Code book cover

Book · Bookshop.org

The Obesity Code

by Jason Fung

One doctor’s view of hormones, appetite and meal timing.

Buy now at Bookshop.org →

Free tools

No signup needed.

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🧭 Fasting quizFind the right guide to read.⏱️ Fasting timerSee elapsed and remaining time.🗓️ Schedule plannerSketch an example day.✅ Daily checklistA short printable list.

Learn the basics

Short guides for beginners.

All guides →
What is intermittent fasting?The basic idea, the terms, and what a window means.16:8 fasting explainedAbout 16 hours fasting and an 8-hour eating window.What to drink while fastingWater, plain coffee and tea, and what may end a window.Hunger while fastingWhy hunger comes in waves, and when to stop.How to break a fastEnd a daily fast with an ordinary meal.Fasting schedules compared12:12, 14:10, 16:8 and 18:6 side by side.

Who runs PureFasting?

PureFasting is run by Geraldin Gobvu in Denmark. It is an educational site: plain guides, simple free tools and a short list of apps and books that beginners find useful. It is not a clinic and does not give personal medical advice.

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  • ✓ No cure or weight-loss promises
  • ✓ Every affiliate link is labelled
  • ✓ Free starter guide: read it here

Safety first. People who are pregnant, breastfeeding, under 18, have an eating disorder or a history of one, have diabetes or hypoglycemia, take medication, or have a heart, kidney or other medical condition should talk with a healthcare professional before fasting. Stop a fast and get help if you feel faint, confused or unwell.

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