Is Blimbi a Free Intermittent Fasting App?
Blimbi is a free fasting app for iPhone and Android. Use the timer, journal, reminders and CSV export without an account or ads; Blimbi Plus is optional.
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In 30 seconds
Yes. Blimbi is a free fasting app for iPhone and Android, with a timer, basic journal, reminders and CSV export. You can use them without an account or ads; Blimbi Plus adds optional features, but starting, ending and correcting a fast stay free.
- The timer, basic journal, reminders and CSV export are free.
- No account is needed; signing in is only for optional encrypted sync.
- The app shows no ads, including in the free version.
- Blimbi Plus is optional, and your app store shows its price and terms before you buy.
- Phase names are a time-based guide, not a measurement of your body.
What is free in Blimbi?
Start and end a fast, review earlier records and set reminders without paying. The free tools cover the everyday routine.
| Free feature | What it does |
|---|---|
| Fasting timer | Start from the time you last ate, end when you choose and correct start or end times later |
| Journal | Saved fasts with their start, end and target |
| Reminders | Optional notifications that you configure yourself |
| CSV export | Your fasting records in a spreadsheet-friendly file |
| Safety information | Short safety reads and a notice once a fast reaches 36 hours |
| Widgets | Widgets and Live Activities on iOS |
Blimbi Plus is optional. It adds custom weekly rhythms, deeper analysis and more personalization; the app store shows its terms before you subscribe, and you manage or cancel it in your store settings.
Download links for the App Store and Google Play are on the Blimbi app page. If you are comparing several apps, the fasting app comparison lists what each official source confirms.
Do you need an account?
You can start without creating an account: Blimbi works locally on your phone. Sign in only if you want optional encrypted sync. The app shows no ads, including on the free tier.
How does the free timer work?
The timer has Fasting and Eating states, and Blimbi never starts or ends a fast automatically. Start fast now asks when you last ate. End fast lets you finish early, save a partial fast or keep going; you can correct times later. The ring’s phase name is based on recorded hours, not a body measurement.
There is no single hour when the metabolic switch begins for everyone; timing depends on prior meals, activity and individual energy stores.Source 1
Every button and option is explained in how to use the Blimbi fasting timer; to choose a schedule, see how to calculate intermittent fasting hours.
Can the app detect fasting phases?
Mixed evidence
Why phases are labelled as estimates
No. Blimbi's phase names come from elapsed time, not a measurement. Reviews describe a gradual shift from glucose toward fat and ketone use, but its timing varies with meals, activity and energy stores.Source 1
Who should check before fasting?
Blimbi is a timer and journal, not medical care. At 36 hours, the ring turns blue and Blimbi shows a supervision notice. Extended fasts need professional oversight; end a fast if you feel dizzy, severely weak or confused.
Talk to a qualified health professional before fasting if you are pregnant or breastfeeding, under 18, living with or recovering from an eating disorder, have diabetes, take insulin or a medicine affected by meal timing, are an older adult, or are acutely ill. Do not change the dose or timing of any medicine without your clinician. See Blimbi’s safety guide.
Frequently asked questions
Is Blimbi a free intermittent fasting app?
Yes. The timer, basic journal, reminders and CSV export are free on iPhone and Android, with no account or ads. Its phase names are time-based estimates, not measurements of ketosis.Source 1
Can I use a fasting app if I have diabetes?
Talk to your clinician first. People with diabetes who fast face risks such as low or high blood sugar and dehydration, so fasting needs a clinician's plan, and medicines should never be changed because of a timer.Source 2
Sources
Flipping the Metabolic Switch: Understanding and Applying the Health Benefits of FastingStephen D. Anton et al. Wiley, February 1, 2018.DOI: 10.1002/oby.22065 · PMID: 29086496Narrative or mechanistic review
Fasting Safely with DiabetesMartin M. Grajower. National Institute of Diabetes and Digestive and Kidney Diseases, August 26, 2020.Official guidance