Comparison

ATL Jet Fuel Calculation vs Study Timer

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

Head to head
About

ATL Jet Fuel Calculation

Features
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Jet refuel calculation for Airline personnel. App make it effortless to calculate refuelling figures of jet Aeroplane. Turning the phone to landscape mimics the layout of the Aeroplane technical logbook and it makes it easy to just copy the numbers to ATL.

About

Study Timer

This app helps you focus on tasks with customizable timers, motivational quotes, and visual progress tracking. It prioritizes user privacy by storing all data locally on your device. Features include Pomodoro timers, repeating sessions, and lock screen integration.

Highlights
  • Customizable timed tasks
  • Dynamic Island and Live Activity integration
  • Pomodoro timer with customizable cycles
  • Repeating sessions scheduling
  • Visual progress tracking chart
  • Motivational quotes
  • No data collection
Read full description

Keep your focus sharp, your privacy protected, and your productivity soaring. From motivational quotes and task names, to a progress chart that displays your daily focus for each task, along with separate cards for historical data, Study Timer - Shadow Task is the perfect app for students, hobbyists, professionals, and anyone looking to track and master their time. Everything you do stays on your device and never leaves the app. We believe that unnecessary data collection is a violation of your trust. That’s why we don’t collect any data. We listen to your feedback. If there’s a feature you’re dying to see, an annoying software bug, or confusing design choices that drive you crazy, simply select Submit Feedback in the Settings sheet and drop us a note. We’ll get the issue fixed or the feature added as soon as possible! Key Features: - Customizable Timed Tasks: Create, edit, and delete tasks with ease. Set individual durations for both session and break times, tailoring each task to fit your needs. - Dynamic Island and Live Activity: View timer intervals and progress from your lock screen or in the Dynamic Island while concentrating in another app. - Pomodoro: Stay productive with timed work intervals followed by breaks. The work-break cycle can be customized for each task, giving you full control of your focus. - Repeating Sessions: Need a task to repeat? Schedule how many times you want your work-break combo to cycle, helping you maintain consistent progress. - Visual Progress Tracking: Track your progress with an intuitive chart that resets daily. Get insights on your total focus time across days, weeks, months, and years. - Motivational Quotes: Make your focus time personal by drawing inspiration from other people. You can even enter your own quotes! - No Data Collection: Your privacy matters. Shadow Task stores all data locally on your device, ensuring that your personal task history and progress remain completely private. Why Shadow Task? Shadow Task goes beyond just a basic timer. It gives you the flexibility to customize your focus sessions while ensuring you get the breaks you need to stay energized and avoid burnout—all while preserving your privacy. With its easy-to-use interface and powerful tracking features, you’ll be able to see your productivity soar. What’s more, Shadow Task allows you to take control of your time and productivity. Every moment you focus is one less moment spent on distractions and one more moment to spend meaningfully. Shadow Task helps you save time and focus on what really matters. Download Shadow Task today and take control of your time, one task at a time. We’re here to cheer you on the whole way!

Screenshots

ATL Jet Fuel Calculation4 screens
Study Timer4 screens

Verdict

The call

The clearest difference is price: Study Timer at Free against ATL Jet Fuel Calculation's $0.99. ATL Jet Fuel Calculation's advantage is in-app purchases (none vs 3) and iOS requirement (14.0 vs 17.6). On update cadence, 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

Study Timer is free to download; ATL Jet Fuel Calculation costs $0.99 up front. Study Timer sells 3 one-off in-app purchases. ATL Jet Fuel Calculation asks for nothing beyond the download.

UpkeepUpdate frequency

ATL Jet Fuel Calculation ships an update every 2 months, Study Timer monthly. The most recent releases landed on September 22, 2026 and July 23, 2026 respectively.

Scorecard3 real differences · 7 level
ATL Jet Fuel Calculation versus Study Timer: the parameters behind the verdict, then further details
ParameterATL Jet Fuel CalculationStudy Timer
Price$0.99Free — better
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS14.0 — better17.6
Further details — not scored
Size1 MB9 MB
Age rating4+4+
DeveloperZlatko BlagusCurvachip LLC

In-app purchases

None

ATL Jet Fuel Calculation

No in-app purchases

3 purchases

Study Timer

One-time3
  • Cup of Coffee$2.99
  • Pomodoro Patron$4.99
  • Deep Work Donor$9.99

Questions

Is ATL Jet Fuel Calculation free?
ATL Jet Fuel Calculation costs $0.99, with no in-app purchases.
Is Study Timer free?
Study Timer is free to download, with in-app purchases available.
Do ATL Jet Fuel Calculation or Study Timer have ads?
Neither ATL Jet Fuel Calculation nor Study Timer shows ads.
Which is updated more often, ATL Jet Fuel Calculation or Study Timer?
ATL Jet Fuel Calculation ships an update every 2 months, and Study Timer monthly. Most recently, ATL Jet Fuel Calculation was updated on September 22, 2026 and Study Timer on July 23, 2026.

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