Time vs Logbook One
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time
Easily add and subtract hours and minutes without complex conversions. View calculations in real-time and save them for later. Convert time to decimal format and perform advanced operations with the premium version.
- Add and subtract hours and minutes
- Real-time calculation display
- Save calculations
- Convert hours to decimal
- Divide and multiply time (premium)
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Our calculator is designed to help you add and subtract hours and minutes rapidly and without going into complicated conversions. Handy and user friendly, you will be able to see your calculations as you write them down and thus not loosing the thread during long additions. The App keeps all your calculations in memory after closing it. You can calculate up to hundreds of thousands of hours. You can easily convert hours in decimal for instance 2h30 = 2,5 With our Premium version you will also be able to divide and multiply your hours and minutes. The Premium version doesn’t have any adds.
Logbook One
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Logbook One is a modern pilot logbook built to manage more than just flight time. Record flights, manage crew and aircraft, track your flying history, organize important notes, documents, and images, and keep the information you need throughout your aviation career in one place. For student pilots and pilots in training, Requirements helps you track training progress, experience requirements, and other milestones so you can see what has been completed and what still needs attention. Moving from another logbook? Logbook One includes flexible import tools with Custom Mapping, allowing you to match columns from your existing logbook to Logbook One fields, review the results before importing, and bring your records across even when the original format is different. Journey Log lets you capture more than numbers. Save memorable flights, lessons learned, unusual situations, and experiences you may want to revisit for future interviews — while also building a personal record of your flying career that can stay meaningful long after retirement. Storage gives you a personal library for the information you want to keep with your flying records. Organize notes, documents, and images into folders, save multiple images together, and quickly view the reference material you want to keep close throughout your career. Other features include: - Fast and flexible flight entry - Take a photo of your ACARS to enter data - Crew profiles and flights flown together - Aircraft management and flight history - Airports and visited-airport history - Journey Log for memorable flights, lessons, and experiences - Storage for notes, documents, and multi-image collections - Folder organization for your personal aviation reference library - Requirements and training progress tracking - Currency and expiry tracking - Custom-mapped logbook import with preview and review tools - FAA, Transport Canada, and EASA style logbook exports - PDF and spreadsheet export - Optional Google Drive backup and restore Local-first data storage Your flying records and personal library stay on your device unless you choose to export or back them up. Logbook One is free to try, with a one-time lifetime unlock available. No subscriptions. No ads. Made by a pilot, used by a pilot.
Screenshots
Verdict
The clearest difference is ads: Logbook One at none against Time's shown. Logbook One also leads on update cadence (every 8 days vs every 2 months). On price, in-app purchases, device support and iOS requirement 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. Time sells 6 one-off in-app purchases and Logbook One sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Time ships an update every 2 months, Logbook One every 8 days. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.
| Parameter | Time | Logbook One |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (362 ratings) — better | — |
| Positive reviews | 74.0% of reviews | — |
| Number of ratings | 362 — better | — |
| Update frequency | Every 2 months | Every 8 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | Adrien Brecheteau | Sung Yeon Cho |
Bugs and requests
Time
Reported bugs
5 issues- App closes after 30 seconds of use
- Background music stops when app is active
- App doesn't rotate with screen orientation
- Inconsistent UI rendering
- Cannot handle subtraction of larger time values
Requested features
7 requests- Hours, minutes, and seconds display format
- Dedicated hours tab for easier input
- Multiply and divide time functions
- Decimal point support for calculations
- Screen rotation support for iPad
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- Switch between hours and minutes output units
- Minutes input above 99
Logbook One
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Time
- Delete Ads$1.99
- Tip 1$3.99
- Tip 2$8.99
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- Tip 3$26.99
- Tip 4$45.99
- Tip 5$89.99
Logbook One
- Lifetime Unlock$4.99









