Fasting Window vs Sleep Flight
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fasting Window
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Record your own fasting times, without an account. YOUR TIMES IN ONE WINDOW - Read your planned time to eat again, with its date - Correct an active start within the past 24 hours - Choose no goal to record elapsed time without a planned time - Keep your selected 16:8, 18:6, 20:4, OMAD or Custom preset (Custom is saved as 16 hours) - Receive a reminder at your chosen goal, when notifications are allowed - End at any time, including before your chosen goal KEEP YOUR RECORDS - See actual lengths and summaries from your last 90 records - Correct the end time of records that ended within the past 24 hours - Existing local records and settings are preserved SAFETY INFORMATION This is a time record, not a medical tool. It does not measure metabolism or provide medical advice. Goals are personal settings, not recommendations to fast longer. Talk with a healthcare professional before considering fasting, especially if you are under 25, pregnant or breastfeeding, take insulin or diabetes medicines, take medicines that require food, have a seizure disorder, work night shifts or operate heavy machinery. If you have or have had an eating disorder, avoid fasting and consult a healthcare professional. If you feel unwell, stop regardless of your goal and seek professional advice. Sources: NIH News in Health, To Fast or Not to Fast, December 2019; https://newsinhealth.nih.gov/2019/12/fast-or-not-fast Johns Hopkins Medicine, Intermittent Fasting: What is it, and how does it work?, updated April 7, 2026; https://www.hopkinsmedicine.org/health/wellness-and-prevention/intermittent-fasting-what-is-it-and-how-does-it-work
Sleep Flight
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Turn your daily sleep into an anticipated journey. Sleep Flight is not just an alarm—it's a gamified flight system designed to cure bedtime procrastination. We use a fun, immersive flight experience to help you put your phone down, fall asleep on time, and wake up gently. [ Core Flight Experience ] Exclusive Boarding Pass: Set your target sleep time (Takeoff) and wake-up time (Landing). The system generates a unique boarding pass for your flight, making self-discipline feel like a ritual. On-Time Takeoff: When it's time for bed, the flight enters "Cruise Mode". Put your phone down and drift into deep sleep accompanied by pure, relaxing white noise. Gentle Landing: No more sudden jump scares. Sleep Flight wakes you up smoothly with gradually increasing, comforting sounds at your target time. Flight Log: Automatically track your sleep duration and routine. Every consistent night turns into visible "flight mileage". [ Who is this flight for? ] "Phone addicts" who want to sleep early but end up doomscrolling. Students and professionals who need a strong routine for morning productivity. Anyone looking to improve sleep quality with a sense of relaxation and ritual. Ready to fly to sweet dreams tonight? Have a pleasant journey!
Screenshots
Verdict
The clearest difference is update cadence: Sleep Flight at every 4 days against Fasting Window's every 2 months. Fasting Window's advantage is iOS requirement (13.0 vs 26.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fasting Window ships an update every 2 months, Sleep Flight every 4 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.
| Parameter | Fasting Window | Sleep Flight |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 21 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | HeungYeol Kim | Chengdu Zhixiang Technology Company Limited |
In-app purchases
Fasting Window
No in-app purchases
Sleep Flight
No in-app purchases








