EngineCalc vs AutoTech
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
AutoTech
This automotive calculator provides quick computations for over 45 formulas across various vehicle systems. It supports both U.S. and metric units, making it a versatile tool for mechanics, technicians, and enthusiasts.
- 45+ automotive formulas
- Aerodynamics calculations
- Chassis calculations
- Drivetrain calculations
- Engine calculations
- Performance calculations
- Suspension calculations
- Tire calculations
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AutoTech is an automotive calculator that offers the mechanic, technician or enthusiast quick computation of 45+ formulas in the areas of aerodynamics, chassis, drivetrain, engine, performance, suspension, and tires. Supports both U.S. and metric units.
Screenshots
Verdict
The clearest difference is review sentiment: AutoTech at 100% against EngineCalc's 60%. EngineCalc's advantage is update cadence (every 2 months vs every 32 months) and price ($0.99 vs $1.99). On ads, in-app purchases, monetization model 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
EngineCalc costs $0.99 and AutoTech $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
EngineCalc ships an update every 2 months, AutoTech every 32 months. The most recent releases landed on September 21, 2026 and September 29, 2026 respectively.
| Parameter | EngineCalc | AutoTech |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 2.3 (3 ratings) — better | — |
| Positive reviews | 60.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months — better | Every 32 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 6.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 8 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | iTrinity, Inc. | Steven Clarner |
Customer experience
EngineCalc
AutoTech
In-app purchases
EngineCalc
No in-app purchases
AutoTech
No in-app purchases
