Comparison

DoFast vs Fasting Window

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

DoFast

Fasting Timer & Tracker

Intermittent fasting timer

Free

💪 Health & Fitness

No ratingsView app →

About

DoFast

Features

Read full description

Smart intermittent fasting tracker. Choose 16:8, 18:6, 20:4, OMAD or custom protocols. - Multiple fasting protocols - Metabolic phase tracking - Timer with eating window - Calendar heatmap - Statistics and streaks - Dark mode - English and Hebrew Not medical advice. Consult your doctor. Use at your own risk.

About

Fasting Window

Features

Read full description

A simple, beautiful intermittent fasting timer that just works. No account, no clutter — start your fast in one tap. TRACK YOUR FAST • 16:8, 18:6, 20:4, OMAD, and custom protocols • Beautiful circular progress ring with metabolic stage badges • Push notification when your fast is complete BUILD YOUR STREAK • Full fast history with streak tracking • Weight tracking with trend charts • See your progress at a glance EATING WINDOW GUIDE • What to eat when breaking your fast • Foods to avoid right after fasting • Re-feeding timing tips Designed to be calm and distraction-free. Your data stays on your device.

Screenshots

DoFast3 screens

Fasting Window3 screens

Verdict

The call

The clearest difference is update cadence: DoFast at every 2 months against Fasting Window's every 4 months. Fasting Window's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

DoFast ships an update every 2 months, Fasting Window every 4 months. The most recent releases landed on October 1, 2026 and October 13, 2026 respectively.

Scorecard2 real differences · 4 level

DoFast versus Fasting Window: the parameters behind the verdict, then further details
Parameter	DoFast	Fasting Window
Price	Free	Free
Update frequency	Every 2 months — better	Every 4 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.0	13.0 — better
Further details — not scored
Size	8 MB	20 MB
Age rating	4+	4+
Developer	Igor Lenderman	HeungYeol Kim

In-app purchases

None

DoFast

No in-app purchases

None

Fasting Window

No in-app purchases

Questions

Is DoFast free?

DoFast is free to download, with no in-app purchases.

Is Fasting Window free?

Fasting Window is free to download, with no in-app purchases.

Do DoFast or Fasting Window have ads?

Neither DoFast nor Fasting Window shows ads.

Which is updated more often, DoFast or Fasting Window?

DoFast ships an update every 2 months, and Fasting Window every 4 months. Most recently, DoFast was updated on October 1, 2026 and Fasting Window on October 13, 2026.