Comparison

Fasty vs 16

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

Head to head
About

Fasty

This app helps users track intermittent fasting by monitoring fasting days and eating periods. It supports weight tracking in both pounds and kilograms and does not collect user data.

Highlights
  • Intermittent fasting tracking
  • Weight tracking
  • Fasting day monitoring
  • Eating period logging
  • Pound and kilogram support
  • No data collection
Read full description

Fasty: the Fasting Tracker helps you track your weight, the days you fast, and when you eat on non-fasting days (intermittent fasting). Fasty doesn't track any of your data, is free, and supports pounds and kilograms.

About

16

This app helps users adopt intermittent fasting by tracking fasting periods, weight changes, and daily water intake. It integrates with Apple Health to import exercise data, providing insights into daily activity alongside dietary progress.

Highlights
  • Fasting tracking
  • Weight tracking
  • Water intake tracking
  • HealthKit integration
  • Fasting progress visualization
Features
Read full description

Now more and more people are trying the new dietary method of intermittent fasting. As a dietary method, intermittent fasting has rapidly become popular worldwide in recent years, attracting a large number of people to try it. This dietary pattern is not only considered an effective weight loss method, but also believed to bring benefits to physical and mental health. What is intermittent fasting? Intermittent fasting is a dietary pattern that cycles between fasting and a normal diet. It doesn't specify which foods you should eat, but when you should eat them. Intermittent fasting does not involve tracking calories. This dietary approach is mainly achieved by limiting the daily eating time, rather than by accurately calculating the amount of calories or protein, fat, and carbohydrates consumed. HealthKit: We import your exercise data from Apple Health to help you understand your daily exercise routine. The intermittent fasting app will provide you with: Fasting Tracking: Intermittent fasting is tracked according to your fasting plan, and you can check your fasting progress at any time to see which stage of intermittent fasting your body is currently in. Weight Tracking: Record the trend of weight changes through daily weight check ins. Drinking water tracking: Set daily drinking water goals and track completion status. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Fasty4 screens
164 screens

Verdict

The call

The clearest difference is in-app purchases: Fasty at none against 16's 3. Fasty also leads on review sentiment (100% vs 78%). 16's advantage is update cadence (every 9 days vs every 16 months) and ratings volume (54 vs 7). On price, rating, ads 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. 16 sells 3 in-app purchases, starting at $1.99 per month. Fasty asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fasty holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: 16 has 54 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 100% of Fasty's written reviews are positive against 78% of 16's.

UpkeepUpdate frequency

Fasty ships an update every 16 months, 16 every 9 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
Fasty versus 16: the parameters behind the verdict, then further details
ParameterFasty16
PriceFreeFree
Rating4.9 (7 ratings) — better4.7 (54 ratings)
Positive reviews100.0% of reviews — better77.8% of reviews
Number of ratings754 — better
Update frequencyEvery 16 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size2 MB6 MB
Age rating4+4+
DeveloperForest and the Trees, LLCHeze Refresh Network Technology Co., Ltd

Customer experience

Fasty

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

16

All ratings54 ratings
Positive92.6%
Neutral1.9%
Negative5.6%
Written reviews27 reviews
Positive77.8%
Neutral7.4%
Negative14.8%

In-app purchases

None

Fasty

No in-app purchases

3 purchases

16

Subscriptions2
  • Pro (Monthly)$1.991 Month
  • Pro (Yearly)$8.991 Year
One-time1
  • Pro (Lifetime)$17.99

Questions

Is Fasty free?
Fasty is free to download, with no in-app purchases.
Is 16 free?
16 is free to download, with in-app purchases available.
Which has better reviews, Fasty or 16?
Fasty is rated higher. Fasty averages 4.9 out of 5 from 7 ratings, while 16 averages 4.7 from 54 ratings.
Do Fasty or 16 have ads?
Neither Fasty nor 16 shows ads.
Which is updated more often, Fasty or 16?
Fasty ships an update every 16 months, and 16 every 9 days. Most recently, Fasty was updated on November 3, 2026 and 16 on November 4, 2026.

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