Units vs Pilot ToolBox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Units
Easily convert between a wide range of measurement units and currencies. Features a clear and simple interface for quick conversions of length, mass, volume, speed, and more. Supports popular currencies and common units for everyday use.
- Extensive unit conversions
- Multiple currency support
- Easy and clear handling
- Converts length, mass, volume
- Supports speed, area, pressure
- Converts time and temperature
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Unit converter with many different units of measurement and currencies. Very easy handling. Clearly arranged. The most important units are amongst others: - Currencies: United States dollar, Euro, Japanese yen, Pound sterling - Length: Mile, kilometer, meter, inch - Mass: Kilogram, pound, ounce, gram - Volume: Liter, gallon (several) - Speed - Area - Units of information - Pressure - Power - Time - Temperature Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Pilot ToolBox
This app simplifies flight planning and time management for pilots. It offers tools to calculate rest periods, off days, flight hours, and night flying times, designed by pilots for pilots to enhance efficiency and schedule control.
- Rest Time Calculator for multi-crew flights
- Off Day Calculator for planning personal time
- 24-hour Time Calculator with history
- Night Time Calculator for flight compliance
- User-friendly interface for pilots
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Your handy aviation toolbox — built by a pilot, for pilots. Pilot ToolBox helps you handle everyday flight chores without spreadsheets or guesswork: night hours, time math, rest planning, roster patterns, and quick reference tools for the line. WHAT YOU CAN DO • Night Time Calculator Calculate night flying time from departure and arrival airports, block times, and date — offline, ready when you need it. • Time Calculator with history Add and subtract times in 24-hour format for logbook totals. Keep a clear history, edit entries, and sum what you need. • Rest Time Calculator Plan in-flight rest for multi-crew / extended-range operations so rest periods stay organized and easy to check. • Off Day Calculator Work fixed on/off patterns (for example 5 on / 4 off)? See future work and off days so you can plan life around the roster. • ACN / PCN Check pavement compatibility before you go. • Dangerous Goods Look up UN numbers and drill codes when you need a quick reference. • NOTAM & METAR codes Decode abbreviations fast instead of digging through manuals. WHY PILOTS USE IT • Built for real airline workflows, not generic “aviation apps” • Clear, focused tools — open, calculate, done • Works alongside MyLog and Airport Notes if you already use them • Some advanced modules are available as optional in-app purchases Whether you are totaling hours for your logbook, planning rest on a long sector, or checking a code on the gate, Pilot ToolBox keeps the essentials in one place. Download Pilot ToolBox and simplify the calculations that eat into your day.
Screenshots
Verdict
The clearest difference is review sentiment: Pilot ToolBox at 100% against Units's 45%. Units's advantage is price (Free vs $2.99) and rating (4.9 vs 3.0). On update cadence and in-app purchases 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
Units is free to download; Pilot ToolBox costs $2.99 up front. Units sells 3 in-app purchases, starting at $0.99 per month and Pilot ToolBox sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Units holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: Units has 261 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 45% of Units's written reviews are positive against 100% of Pilot ToolBox's, so the app with the better star average is not the one people write more warmly about.
Units ships an update every 5 weeks, Pilot ToolBox every 2 months. The most recent releases landed on September 23, 2026 and August 29, 2026 respectively.
| Parameter | Units | Pilot ToolBox |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.9 (261 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 45.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 261 — better | 2 |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 15.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 3 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Andreas Maier | Bahadir ARSLAN |
Customer experience
Units
Pilot ToolBox
In-app purchases
Units
- Monthly7 Days trial$0.991 Month
- Yearly7 Days trial$4.991 Year
- One time purchase$9.99
Pilot ToolBox
- Rest Time Calculator$1.99
