Comparison

AutoTech vs Carburetor CFM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

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About

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.

Highlights

45+ automotive formulas
Aerodynamics calculations
Chassis calculations
Drivetrain calculations
Engine calculations
Performance calculations
Suspension calculations
Tire calculations

Features

Read full description

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.

About

Carburetor CFM

Features

Read full description

With our carburetor CFM calculator, we will prevent you from ruining your engine.

Screenshots

AutoTech4 screens

Carburetor CFM3 screens

Verdict

The call

The clearest difference is price: Carburetor CFM at Free against AutoTech's $1.99. Carburetor CFM also leads on update cadence (every 6 days vs every 32 months) and iOS requirement (13.0 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

CostPrice · In-app purchases · Ads · Monetization

Carburetor CFM is free to download; AutoTech costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

AutoTech ships an update every 32 months, Carburetor CFM every 6 days. The most recent releases landed on September 10, 2026 and December 3, 2025 respectively.

Scorecard3 real differences · 5 level

AutoTech versus Carburetor CFM: the parameters behind the verdict, then further details
Parameter	AutoTech	Carburetor CFM
Price	$1.99	Free — better
Positive reviews	100.0% of reviews	—
Update frequency	Every 32 months	Every 6 days — better
Ads	No	No
In-app purchases	No	No
Monetization	Paid	—
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	15.6	13.0 — better
Further details — not scored
Size	2 MB	40 MB
Age rating	4+	4+
Developer	Steven Clarner	STAGE CODING, Travnik

In-app purchases

None

AutoTech

No in-app purchases

None

Carburetor CFM

No in-app purchases

Questions

Is AutoTech free?

AutoTech costs $1.99, with no in-app purchases.

Is Carburetor CFM free?

Carburetor CFM is free to download, with no in-app purchases.

Do AutoTech or Carburetor CFM have ads?

Neither AutoTech nor Carburetor CFM shows ads.

Which is updated more often, AutoTech or Carburetor CFM?

AutoTech ships an update every 32 months, and Carburetor CFM every 6 days. Most recently, AutoTech was updated on September 10, 2026 and Carburetor CFM on December 3, 2025.