Comparison

Fasting Window vs Fasting Timer

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

Head to head

Fasting Window

Intermittent fasting timer

Intermittent fasting timer

Free

💪 Health & Fitness

No ratingsView app →

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.

About

Fasting Timer

Features

Read full description

Fasting Timer - SLOX is a lightweight intermittent-fasting countdown timer designed to keep tracking simple. Features: • Preset protocols: 16:8, 18:6, 20:4 — plus a fully custom protocol • Live countdown showing time elapsed and time remaining • Past-fast history with completion status • Quick-start and one-tap stop • Sound & haptic toggles • 7 languages supported (English / 한국어 / 日本語 / 简体中文 / 繁體中文 / Español / Português) NOT a medical device. The timer simply counts down the duration you choose. It does not measure metabolic state, glucose, or any biomarker, and it does not diagnose any condition. Intermittent fasting may not be safe for everyone (pregnant or breastfeeding individuals, people with diabetes, eating disorders, or other medical conditions). Consult a healthcare professional before starting any fasting routine.

Screenshots

Fasting Window3 screens

Fasting Timer3 screens

Verdict

The call

The clearest difference is ads: Fasting Window at none against Fasting Timer's shown. Fasting Timer's advantage is update cadence (every 2 days vs every 4 months). On price, in-app purchases, device support and iOS requirement 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

Fasting Window ships an update every 4 months, Fasting Timer every 2 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 4 level

Fasting Window versus Fasting Timer: the parameters behind the verdict, then further details
Parameter	Fasting Window	Fasting Timer
Price	Free	Free
Update frequency	Every 4 months	Every 2 days — better
Ads	No — better	Yes
In-app purchases	No	No
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	13.0	13.0
Further details — not scored
Size	20 MB	23 MB
Age rating	4+	4+
Developer	HeungYeol Kim	SEOKWON YANG

In-app purchases

None

Fasting Window

No in-app purchases

None

Fasting Timer

No in-app purchases

Questions

Is Fasting Window free?

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

Is Fasting Timer free?

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

Do Fasting Window or Fasting Timer have ads?

Fasting Timer shows ads; Fasting Window does not.

Which is updated more often, Fasting Window or Fasting Timer?

Fasting Window ships an update every 4 months, and Fasting Timer every 2 days. Most recently, Fasting Window was updated on October 13, 2026 and Fasting Timer on October 7, 2026.