Time Calculator Premium vs Airro Refuel LearJet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time Calculator Premium
Easily add and subtract hours and minutes without complex conversions. This app remembers your calculations and allows for large hour amounts, plus decimal conversion. The premium version offers multiplication and division of time values.
- Add and subtract hours/minutes
- Decimal time conversion
- Save calculations
- Multiply/divide time values
- Ad-free experience
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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 this Premium version you will also be able to divide and multiply your hours and minutes. The Premium version doesn’t have any adds.
Airro Refuel LearJet
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Handy tool for refueling a LearJet35 aircraft. The required fuel distribution is calculated based on the input values lbs or liters. The cumulative fuel amount is calculated to verify that the amount corresponds with the fuel truck gauge. The values of the fuel stages are graphically shown. I build this tool to quickly make the calculations and show the fueler in an easy way how to refuel this airplane.
Screenshots
Verdict
The clearest difference is update cadence: Time Calculator Premium at every 6 months against Airro Refuel LearJet's every 28 months. Airro Refuel LearJet's advantage is price ($0.99 vs $3.99) and iOS requirement (12.4 vs 15.6). On 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
Time Calculator Premium costs $3.99 and Airro Refuel LearJet $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Time Calculator Premium ships an update every 6 months, Airro Refuel LearJet every 28 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Time Calculator Premium | Airro Refuel LearJet |
|---|---|---|
| Price | $3.99 | $0.99 — better |
| Rating | 4.6 (10 ratings) — better | — |
| Positive reviews | 68.8% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 6 months — better | Every 28 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.4 — better |
| Further details — not scored | ||
| Size | 5 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Adrien Brecheteau | Christian van der Meij |
In-app purchases
Time Calculator Premium
No in-app purchases
Airro Refuel LearJet
No in-app purchases
Questions
Is Time Calculator Premium free?
Is Airro Refuel LearJet free?
Do Time Calculator Premium or Airro Refuel LearJet have ads?
Which is updated more often, Time Calculator Premium or Airro Refuel LearJet?
Other comparisons
