Comparison

Engine RPM vs Tameron

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

Head to head
About

Engine RPM

Analyze engine sound to calculate RPM using advanced signal processing. Ideal for engine setup and diagnostics, it supports various engine types and provides real-time feedback for accurate readings.

Highlights
  • Acoustic RPM measurement
  • Engine sound analysis
  • Supports 2-stroke/4-stroke engines
  • Configurable cylinder count
  • Real-time autocorrelation graph
  • Adjustable update periods
  • Low-pass filtering
Features
Read full description

Measure the RPM of an engine by analyzing the sound it makes. Engine RPM listens to the sound of a running engine and uses advanced signal processing algorithms to extract the frequency of that sound and calculate the RPM. This app is primarily for setup and diagnostics of engines. After setting the the number of cylinders and whether the engine is a 2-stroke or 4-stroke engine, the app can work with any internal combustion engine, from diesel tractors to aircraft engines to motorcycles to chainsaws. To use the app you must set an expected RPM range to guide the analysis algorithms to the correct RPM. A real-time graph of the autocorrelation graph is displayed to help in troubleshooting and adjusting the expected RPM range. The analysis requires a clear sound from the engine without excessive interference from extraneous sounds. Do not expect to read the RPM of an engine while other things are making too much noise at the same time. The analysis also requires that the RPM be stable. It cannot read the RPM of an engine that is rapidly accelerating. For this reason, and because of the need for adjusting the expected RPM range, this app should not be considered a drop-in replacement for an operational tachometer. Setup options include update periods from 93 milliseconds to 1.5 seconds, one to 12 cylinders, 2-stroke or 4-stroke, low-pass filtering, and signal clipping. The overall RPM range is 400 to 90,000 RPM (although at any one time, the operational range is typically +/- 30% around a nominal expected RPM). Precision is usually about +/- 10 RPM.

About

Tameron

Manage your automotive needs with this app. Schedule service appointments, view special offers, and access your digital glovebox. It's a convenient way to handle all your car maintenance and contact information.

Highlights
  • Schedule appointments
  • View special offers
  • Start chat support
  • View maintenance plan services
  • Utilize digital glovebox
  • Update contact information
Read full description

The Chris Myers Automall app provides a portal for users to: • Schedule Appointments • View Special Offers • Start a Chat for any questions they have • View Services in their Maintenance Plan (where applicable) • Utilize the Digital Glovebox • And update contact information when needed. It's your one-stop shop for all your automotive needs.

Screenshots

Engine RPM3 screens
Tameron4 screens

Verdict

The call

The clearest difference is price: Tameron at Free against Engine RPM's $8.99. Tameron also leads on update cadence (every 3 months vs every 16 months). Engine RPM's advantage is ratings volume (35 vs 1) and iOS requirement (13.0 vs 16.6). On rating, ads, in-app purchases and monetization model 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

Tameron is free to download; Engine RPM costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.0 for Engine RPM against 4.0 for Tameron. That said, the two scores are not equally well evidenced: Engine RPM has 35 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Engine RPM ships an update every 16 months, Tameron every 3 months. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

Scorecard4 real differences · 6 level
Engine RPM versus Tameron: the parameters behind the verdict, then further details
ParameterEngine RPMTameron
Price$8.99Free — better
Rating4.0 (35 ratings)4.0 (1 ratings)
Positive reviews47.7% of reviews—
Number of ratings35 — better1
Update frequencyEvery 16 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better16.6
Further details — not scored
Size3 MB72 MB
Age rating4+4+
DeveloperReal-Time SpecialtiesDealer's Choice, Inc.

Customer experience

Engine RPM

All ratings35 ratings
Positive74.3%
Neutral2.9%
Negative22.9%
Written reviews65 reviews
Positive47.7%
Neutral7.7%
Negative44.6%

Tameron

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Engine RPM

Reported bugs

12 issues
  • Does not register live RPM readings
  • Displays incorrect or random numbers
  • App opens then closes immediately
  • Blank display or flashes incorrect data intermittently
  • Cannot get consistent readings
Show 7 more
  • Does not work on specific devices (e.g., iPhone 6)
  • E-motor measurement not possible
  • Readings are not accurate
  • Cannot get a reliable reading
  • Randomly skips between significantly different numbers
  • Generates random numbers
  • Does not recognize sound correctly

Requested features

5 requests
  • Save configuration settings
  • Option to display cycle/cylinder count on home screen
  • Improved response time for transient surges
  • Simplified or automated setup process
  • Auto-scaling graphical display for easier harmonic matching

Tameron

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Engine RPM

No in-app purchases

None

Tameron

No in-app purchases

Questions

Is Engine RPM free?
Engine RPM costs $8.99, with no in-app purchases.
Is Tameron free?
Tameron is free to download, with no in-app purchases.
Which has better reviews, Engine RPM or Tameron?
Engine RPM and Tameron are both rated 4.0 out of 5 on the App Store, from 35 and 1 ratings respectively.
Do Engine RPM or Tameron have ads?
Neither Engine RPM nor Tameron shows ads.
Which is updated more often, Engine RPM or Tameron?
Engine RPM ships an update every 16 months, and Tameron every 3 months. Most recently, Engine RPM was updated on October 16, 2026 and Tameron on October 6, 2026.

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