Comparison

Fast AI vs 16

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

Head to head
About

Fast AI

This app helps users achieve weight loss and improve well-being through intermittent fasting. It provides tracking, scheduling, and detailed analytics to guide users through various fasting plans. The app aims to make fasting a natural and effective part of a healthy lifestyle.

Highlights
  • Intermittent fasting tracker
  • Weight monitoring
  • Fasting and food window notifications
  • Detailed analytics
  • Multiple fasting schemes (e.g., 16/8)
  • Fasting schedule
  • Apple Health weight sync
Features
Read full description

FastMe - YOUR PROFESSIONAL FASTING ASSISTANT WHY CHOOSE FASTING? The most natural way to lose weight and keep fit. Improve your body and brain function. Burn your body fat reserves. Boost your growth hormone. Lose weight without diet and exercise. Make you feel more active. No need to count calories intake. FEATURES OF FASTING TRACKER - Intermittent fasting tracker - Weight monitoring - Notifications about start/end of fasting and food window - Detailed analytics - Most popular 16/8 scheme and more - Fasting schedule - Weight sync with Apple Health IS IT EFFECTIVE? It’s proven that this healthy lifestyle leads to fast weight loss. During fasting, as your glycogen depletes, your body switches to ketosis, which is referred to as the body's "fat-burning" mode. This is an effective way to burn fat. IS IT SAFE? Yes. It’s the most natural and safe way to lose weight. Studies show that eating all the time makes your body unable to take a break from digesting. When you fast, you just take a break from eating, it takes some of the load off your liver. CAN I USE FASTING TRACKER? With various fasting plans, fasting tracker is suitable for beginner and experienced, men and women. It guides you through your plan. No need to change your diet, you can easily stick to it. Disclaimer The contents of this app are intended for informational purposes only and not for the purpose of rendering medical advice. If you have any health issues, please consult your doctor before fasting and making any medical decisions. START A FREE TRIAL to familiarize yourself with all the app’s features. UNLIMITED ACCESS MEMBERSHIP SUBSCRIPTION Subscription can be canceled anytime. Payment will be charged to your iTunes Account at confirmation of purchase. Your subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current subscription. Your account will be charged for a renewed subscription within 24 hours prior to the end of current subscription. You can manage your subscription and switch off the auto-renewal by accessing your account settings after purchase. You cannot cancel the current subscription during the active subscription period. Any unused part or time-span of a free trial period will be forfeited, as soon as you purchase a subscription. All personal data is protected in accordance with the Terms of Use and Privacy Policy: Terms Of Use - https://docs.google.com/document/d/1m7ZBk0KB3KTmMfxwOvNmLuwMqQFwb-pPfbx66ZwiRtY Privacy Policy - https://docs.google.com/document/d/1pRTTuB8JbbtRMf63WT39JTws1sGbNceciEgRFeGIjXI

About

16

Track your intermittent fasting journey with customizable plans and real-time analytics. Log meals and water intake, and receive personalized meal tips to support your weight loss goals. Supports various popular fasting methods.

Highlights
  • Intermittent fasting timer
  • Custom fasting plans
  • Real-time analytics
  • Meal and water tracker
  • Meal tips and recipes
  • Multiple fasting modes
Features
Read full description

Lose Weight The Healthy Way With Fast 16:8 Fasting Timer Intermittent Fasting have never been easier with our app! Try the most popular and effective fasting techniques all in one powerful tool: Intermittent Fasting - Choose from various IF time ranges and see our countdown fasting timer keep you on track! Custom Fasting Plans - Create custom fasting schedules and meal plans tailored to your goals. Real-Time Analytics - Get insights into your progress with detailed analytics and graphs tracking your weight loss journey. Meal & Water Tracker - Note your meals and water intake during eating windows with our meal logger. Meal Tips - Get customized meal ideas and recipes for your fasting regimen from our large database. Switch between fasting modes easily: 16:8, 5:2, The Warrior and more. Relax and #EmbraceTheFast with the most complete fasting app. Download now to start losing weight the right way! - Subscription starts from USD 3.99. + a week subscription + a month subscription + a year subscription • Check in app for exact pricing in your region • Payment will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration/price selected) unless auto-renew is turned off at least 24 hours before the end of the current period. • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable • You can manage your subscription and/or turn off auto-renewal by going to your iTunes Account Settings, but refunds will not be given for any unused portion of the term. Terms of Service: https://www.maplelabs.co/policies/#terms Privacy: https://www.maplelabs.co/policies/#terms If you have any feedback, do not hesitate to contact us at support@maplelabs.co

Screenshots

Fast AI4 screens
163 screens

Verdict

The call

The clearest difference is review sentiment: 16 at 100% against Fast AI's 7%. Fast AI's advantage is ads (none vs shown) and rating (4.3 vs 4.0). On price, in-app purchases, monetization model 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. Fast AI sells 5 in-app purchases, starting at $5.99 per 7 days and 16 sells 5 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Fast AI holds the better App Store score, 4.3 against 4.0. That said, the two scores are not equally well evidenced: Fast AI has 120 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 7% of Fast AI's written reviews are positive against 100% of 16's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Fast AI ships an update every 2 weeks, 16 every 6 weeks. Both last shipped on November 3, 2026.

Scorecard5 real differences · 5 level
Fast AI versus 16: the parameters behind the verdict, then further details
ParameterFast AI16
PriceFreeFree
Rating4.3 (120 ratings) — better4.0 (4 ratings)
Positive reviews7.1% of reviews100.0% of reviews — better
Number of ratings120 — better4
Update frequencyEvery 2 weeks — betterEvery 6 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.013.0 — better
Further details — not scored
Size101 MB54 MB
Age rating4+17+
DeveloperKiryl SalaveiMaple Labs Co., Ltd

Customer experience

Fast AI

All ratings120 ratings
Positive82.5%
Neutral3.3%
Negative14.2%
Written reviews14 reviews
Positive7.1%
Neutral0.0%
Negative92.9%

16

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

Fast AI

Subscriptions5
  • Simple intermittent fasting3 Days trial$5.997 Days
  • Intermittent Fasting 1 Month$12.991 Month
  • Personal Fast Program 3 Month$19.993 Months
Show 2 more
  • Intermittent Fasting + Tracker$35.991 Year
  • Intermittent Fasting Annual$49.991 Year
5 purchases

16

Subscriptions5
  • Weekly Premium$4.997 Days
  • Monthly Premium$9.991 Month
  • Yearly Premium3 Days trial$12.991 Year
Show 2 more
  • Premium2 variants$12.993 Months
  • Premium$24.993 Months

Questions

Is Fast AI free?
Fast AI is free to download, with in-app purchases available.
Is 16 free?
16 is free to download, with in-app purchases available.
Which has better reviews, Fast AI or 16?
Fast AI is rated higher. Fast AI averages 4.3 out of 5 from 120 ratings, while 16 averages 4.0 from 4 ratings.
Do Fast AI or 16 have ads?
16 shows ads; Fast AI does not.
Which is updated more often, Fast AI or 16?
Fast AI ships an update every 2 weeks, and 16 every 6 weeks. Most recently, Fast AI was updated on November 3, 2026 and 16 on November 3, 2026.

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