Engine RPM Downloads & RevenueEngine RPM · App Store
Engine RPM is #16 in Utilities Paid in Australia and charting in 2 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperReal-Time Specialties
CategoryUtilities
Price8.99 USD
Released
Rating★ 4.0 (35)
Version2.6.1
Age rating4+
First seen by us
27 Sep 2026
27 Sep 2026Installs (est.)5k+ worldwide
📈New best rank in the overall chart: #133📈Charting in a new country📦Updated to version 2.6.1🆕First spotted by AppInsider📦Version 2.6🆕Released on the App Store
Full timeline · 16 events
- 📈Engine RPM new best rank in the overall chart: #133Top Paid · All Apps · ZA
- 📈Engine RPM charting in a new countrySouth Africa
- 📈Engine RPM new best rank in the overall chart: #140Top Paid · All Apps · AU
- 📈Engine RPM new best rank in the overall chart: #149Top Paid · All Apps · IN
- 📈Engine RPM entered the top 100 in 2 chartsTop Paid · Utilities · CA · Top Paid · Utilities · IN
- 📈Engine RPM charting in a new country in 2 chartsCanada · India
- 📈Engine RPM new best rank in the overall chart: #156Top Paid · All Apps · TR
- 📈Engine RPM charting in a new countryTurkey
- 📈Engine RPM entered the top 100Top Paid · Utilities · US
- 📈Engine RPM charting in a new countryUnited States
- 📦Engine RPM updated to version 2.6.1Fixed a bug that prevented the saving of the number of cylinders when the app is closed.
- 📈Engine RPM entered the top 100Top Paid · Utilities · AU
- 📈Engine RPM charting in a new countryAustralia
- 🆕Engine RPM first spotted by AppInsider#66 in Top Paid · All Apps · Sweden
- 📦Engine RPM version 2.61. The app is updated to target iOS 26 requirements.
2. The colors of the engine type selection page are changed to enhance clarity.
3. Size of log of RPM readings is doubled from 512 to 1024.
4. Minimum logging interval lowered from 2 seconds to 1 second.… more - 🆕Engine RPM released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.0 ★
35 ratings
Measured
Best rank now
#16
Utilities PaidMeasured
Engine RPM on the App Store
App details
App ID
340401811
Publisher
Real-Time Specialties, inc.
On the store since
Dec 2009
16 years on the store
Minimum OS
iOS 13.0+
iPhone 6s and later
Devices
iPhone · iPad
Content rating
4+
Languages
1
EN
Size
3 MB
Also listed in
Productivity
Engine RPM downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Engine RPM's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Australia | UtilitiesPaid | #16 |
 Canada | UtilitiesPaid | #88 |
Apps near Engine RPM on the chart
Utilities Paid, around #16.
Ratings
App Store, worldwide.
Rating
4.0 ★
35 ratings
Measured
Ratings
35
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.0★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Utilities apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Engine RPM
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.
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.
Latest updates
2.6.1
Fixed a bug that prevented the saving of the number of cylinders when the app is closed.
2.6
1. The app is updated to target iOS 26 requirements.
2. The colors of the engine type selection page are changed to enhance clarity.
3. Size of log of RPM readings is doubled from 512 to 1024.
4. Minimum logging interval lowered from 2 seconds to 1 second.
