Comparison

Fast Tracker vs Atomic Calories

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

Head to head
About

Fast Tracker

This app simplifies intermittent fasting by allowing users to set custom fasting and eating windows. It provides timely alerts and tracks weight progress, making it ideal for beginners. It helps manage your fasting schedule with ease.

Highlights
  • Customizable fast and eating windows
  • Fasting and eating period timers
  • Start and finish fasting alerts
  • Weight tracking for progress
  • Simple and easy to use interface
Features
Read full description

FastTrack is the world's most simple and flexible fasting tracker. Perfect for those beginning intermittent fasting and looking for a place to start. Choose your fast length and the app will time your fasts and eating periods. - Simple and easy to use - Pick when to start fasting and eating periods - Alerts to remind you when to start and finish fasting - Weight tracking to view your progress over time This is the easiest fast tracker to use if you're just starting out fasting. Simply tell the app when you start and stop eating and it will automatically track your fasts, notifying you when you should begin and end fasting according to your schedule. Studies have shown that Intermittent fasting may help you burn fat, build muscle, reduce oxidative stress and inflammation, and prevent many diseases. Consult a doctor before beginning any new diet program. See terms of service here: https://www.appfactoryfitness.com/terms-of-service/fasttrack-terms-of-service

About

Atomic Calories

Features
Read full description

Atomic Calories is a simple and intuitive app that helps you track your daily food intake. Log your meals in seconds Get a quick overview of calories and macros Stay consistent and hit your goals Whether you're losing weight, gaining muscle, or just eating better — Atomic Calories makes it easy. --- *Note Atomic Calories requires a subscription to use, this one is an auto-renewable subscription* Contact: yourturnai@gmail.com Terms: https://educanalla24.github.io/atomiccalories/terms.html Privacy Policy: https://educanalla24.github.io/atomiccalories/privacypolicy.html

Screenshots

Fast Tracker3 screens
Atomic Calories3 screens

Verdict

The call

The clearest difference is update cadence: Atomic Calories at weekly against Fast Tracker's monthly. 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. Fast Tracker sells 1 in-app purchase, starting at $2.99 per month and Atomic Calories sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Fast Tracker ships an update monthly, Atomic Calories weekly. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

Scorecard1 real difference · 9 level
Fast Tracker versus Atomic Calories: the parameters behind the verdict, then further details
ParameterFast TrackerAtomic Calories
PriceFreeFree
Rating4.7 (430 ratings) — better—
Positive reviews85.7% of reviews—
Number of ratings430 — better—
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.1 — better
Further details — not scored
Size6 MB22 MB
Age rating4+4+
DeveloperApp Factory, LLCEduardo Ferrari

Bugs and requests

Fast Tracker

Reported bugs

4 issues
  • Weight input only accepts first 3 digits despite decimal point display
  • Username validation prevents review submission
  • Cannot retrieve fasting history without premium after update
  • Unable to edit start time without paid subscription

Requested features

9 requests
  • Water intake tracking
  • Extended fasting support (36+ hours, multi-day fasts)
  • Calendar view for planning future fasts
  • 30-minute pre-fast end notifications
  • Ability to edit weight entries
Show 4 more
  • Ability to edit fast start times
  • Support for 5/2 fasts and quarterly fasting plans
  • Decimal precision for weight tracking
  • Diet and fasting tips/guidance

Atomic Calories

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Fast Tracker

Subscriptions1
  • FastTrack Premium Access7 Days trial$2.991 Month
2 purchases

Atomic Calories

Subscriptions2
  • Monthly Premium$9.991 Month
  • Year Premiumm3 Days trial$29.991 Year

Questions

Is Fast Tracker free?
Fast Tracker is free to download, with in-app purchases available.
Is Atomic Calories free?
Atomic Calories is free to download, with in-app purchases available.
Do Fast Tracker or Atomic Calories have ads?
Neither Fast Tracker nor Atomic Calories shows ads.
Which is updated more often, Fast Tracker or Atomic Calories?
Fast Tracker ships an update monthly, and Atomic Calories weekly. Most recently, Fast Tracker was updated on October 10, 2026 and Atomic Calories on October 2, 2026.

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