Percentage vs EngineCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Percentage
This utility calculates proportions between two values expressed as percentages. It allows you to find any unknown value in a percentage equation, including percent increases or decreases.
- Calculate any percentage value
- Find percent increase
- Find percent decrease
- Supports iPhone and iPad
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This percentage calculator helps to find the proportion between two values expressed in percent. You can calculate any value in the percentage equation, just fix the one you want to have calculated. You can choose to calculate the percent increase or decrease between two values as well.
EngineCalc
This utility app provides a collection of essential formulas and calculators for powersports and engine tuning. It allows users to perform complex calculations directly on their iPhone, eliminating the need for a laptop or desktop computer.
- Powersports formulas
- Engine tuning calculators
- Actual Volume Flow
- Air Density
- Compression Ratio
- Cylinder Displacement
- Volumetric Efficiency
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EngineCalc is a collection of useful formulas (calculators) for those involved with powersports or engine tuning, in general. Instead of carrying around a laptop or relying on access to a desktop computer with a spreadsheet, you can get the calculations you need right on the handy iPhone in your pocket. Here is a partial list of the "calculators" provided here in EngineCalc: * Actual Volume Flow * Air Density * BHP Loss * Compression Height * Compression Ratio * Corrected BHP * Cylinder Displacement * Horsepower * Mass Flow * Piston Dome Volume * Piston Speed * Rod Length * Simple Horsepower * Theoretical Volume Flow * Torque * Volumetric Efficiency
Screenshots
Verdict
The clearest difference is rating: Percentage at 3.0 against EngineCalc's 2.3. EngineCalc's advantage is update cadence (every 2 months vs every 14 months) and iOS requirement (6.0 vs 15.6). On price, ratings volume, ads 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
Percentage costs $0.99 and EngineCalc $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Percentage holds the better App Store score, 3.0 against 2.3. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
Percentage ships an update every 14 months, EngineCalc every 2 months. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.
| Parameter | Percentage | EngineCalc |
|---|---|---|
| Price | $0.99 | $0.99 |
| Rating | 3.0 (2 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | — | 60.0% of reviews |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 14 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 6.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Piet Jonas | iTrinity, Inc. |
Customer experience
Percentage
EngineCalc
In-app purchases
Percentage
No in-app purchases
EngineCalc
No in-app purchases
