# EngineCalc vs FrackCalc

The clearest difference is rating: FrackCalc at 5.0 against EngineCalc's 2.3. FrackCalc also leads on review sentiment (100% vs 60%) and update cadence (weekly vs every 2 months). EngineCalc's advantage is price ($0.99 vs $9.99) and ratings volume (3 vs 1). On ads, in-app purchases, monetization model and device support there is nothing between them.

EngineCalc costs $0.99 and FrackCalc $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FrackCalc holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews point the same way: 60% of EngineCalc's written reviews are positive against 100% of FrackCalc's.

EngineCalc ships an update every 2 months, FrackCalc weekly. The most recent releases landed on September 21, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | EngineCalc | FrackCalc |
| --- | --- | --- |
| Price | **$0.99** | $9.99 |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/enginecalc/id378824382/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/frackcalc/id1574572398/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Paid | Paid |
| Size | 8 MB | 13 MB |
| Requires iOS | **6.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [iTrinity, Inc.](https://appshunter.io/developer/547108075) | [Moosaa Young](https://appshunter.io/developer/1574572400) |

## What reviewers say

### EngineCalc

[App page](https://appshunter.io/ios/app/enginecalc/id378824382)

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.

**Highlights:** Powersports formulas, Engine tuning calculators, Actual Volume Flow, Air Density, Compression Ratio, Cylinder Displacement, Volumetric Efficiency

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### FrackCalc

[App page](https://appshunter.io/ios/app/frackcalc/id1574572398)

This app provides on-the-go hydraulic fracturing calculations for the oilfield. It helps determine chemical rates, fluid clean-up, proppant amounts, and pump speeds. Includes a unit converter for common oilfield measurements.

**Highlights:** Hydraulic fracturing calculations, Proppant amount and height determination, RPM calculator for pumping speeds, Hydrostatic calculator for proppant-laden slurry, Oilfield unit converter, Pump rate calculation based on transmission curves

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is EngineCalc free?

EngineCalc costs $0.99, with no in-app purchases.

### Is FrackCalc free?

FrackCalc costs $9.99, with no in-app purchases.

### Which has better reviews, EngineCalc or FrackCalc?

FrackCalc is rated higher. EngineCalc averages 2.3 out of 5 from 3 ratings, while FrackCalc averages 5.0 from 1 ratings.

### Do EngineCalc or FrackCalc have ads?

Neither EngineCalc nor FrackCalc shows ads.

### Which is updated more often, EngineCalc or FrackCalc?

EngineCalc ships an update every 2 months, and FrackCalc weekly. Most recently, EngineCalc was updated on September 21, 2026 and FrackCalc on September 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*