Time vs PF 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.
PF One
This aviation dictionary and pilot toolbox offers a vast database of over 20,000 aviation terms, with Chinese-English support. It features category browsing, search, airport codes, and practical tools like an interview checklist and flight time calculator. Access information offline and benefit from continuous updates.
- Extensive aviation database (20,000+ entries)
- Chinese-English paired entries
- Category filters and search
- Airport and code reference
- Pilot interview checklist
- Flight time calculator
- Offline access
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Welcome to PF Tools, an aviation dictionary and pilot toolbox designed for aviation enthusiasts, student pilots, and aviation professionals. It brings together aviation terminology lookup, category-based browsing, and practical pilot tools in one app, helping you study, search, and prepare more efficiently. Key Features Extensive Aviation Database Access more than 20,000 aviation-related entries across areas such as Airbus, Boeing, NOTAM, METAR, and Airport, so you can quickly find the information you need. Chinese-English Paired Entries Browse aviation entries with Chinese and English terminology support, including Chinese titles, English full names, and explanatory notes to make technical terms and abbreviations easier to understand. Category Filters and Search Use category-based browsing and fast search to locate target entries more efficiently. Airport and Code Reference Entries Includes a large number of airport code and airport-related reference entries for everyday study and lookup. Pilot Toolbox Beyond the dictionary itself, the app also includes a Pilot Interview Checklist and a Flight Time Calculator for practical training and interview preparation scenarios. Offline Access The built-in local database allows you to browse entries even without an internet connection. Continuous Updates We continuously expand the database and improve content quality and usability. PF Tools is more than a dictionary. It is a practical companion for building aviation knowledge and improving preparation efficiency, whether you are studying for exams, organizing reference material, or preparing for interviews and real-world flying tasks. Pilot Flying focuses on pilot interview training and provides end-to-end support, from pilot license conversion to overseas pilot employment. WeChat: PilotFlyingMars Telegram: pilotflyingmars
Screenshots
Verdict
The clearest difference is in-app purchases: PF One at none against Time's 6. PF One also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). Time's advantage is ratings volume (362 vs 2). On price 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
Both are free to download. Time sells 6 one-off in-app purchases. PF One asks for nothing beyond the download.
PF One holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Time has 362 ratings behind it against 2, so its average is the more settled of the two.
Time ships an update every 2 months, PF One every 2 weeks. The most recent releases landed on September 26, 2026 and August 1, 2026 respectively.
| Parameter | Time | PF One |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (362 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 74.0% of reviews | — |
| Number of ratings | 362 — better | 2 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 28 MB |
| Age rating | 4+ | 17+ |
| Developer | Adrien Brecheteau | Shenzhen Pailefei Consulting Services Co., Ltd. |
Customer experience
Time
PF One
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
PF 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
PF One
No in-app purchases
