Comparison

RevMeter Pro vs GEJOScan

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

Head to head
About

RevMeter Pro

This app measures the reverberation time (RT60) of any room using your iPhone. It offers dual measurement modes and calculates RT60 based on RT20 and RT30 decay slopes. Easily export data and visualize acoustic analysis.

Highlights
  • Measures reverberation time (RT60)
  • Dual measurement modes (Impulse, Interrupted Noise)
  • Calculates RT60 using RT20/RT30 standards
  • Data export (CSV, Screenshots)
  • Visual decay curves and spectrograms
Read full description

RevMeter Pro: Professional Reverberation Time Analysis RevMeter Pro is a precision tool designed to measure the reverberation time (RT60) of any room directly from your iPhone. Whether you are an audio enthusiast, student, or acoustician, RevMeter Pro provides quick and reliable acoustic analysis using industry-standard calculation methods. Key Features: Dual Measurement Modes: Supports both Impulse (Burst) and Interrupted Noise methods for versatile testing. RT20 & RT30 Standards: Calculates RT60 based on RT20 and RT30 decay slopes, compensating for the dynamic range limitations of mobile hardware. Data Export: Easily share comprehensive measurement data (CSV) and visual charts (Screenshots) via email or save them to your device for further analysis. Visual Analysis: View real-time decay curves and spectrograms to understand room acoustics instantly. About Reverberation Time: Reverberation Time (RT60) is the time required for sound pressure to decay by 60 dB. Because achieving a full 60 dB dynamic range is challenging in many environments, RevMeter Pro utilizes the established RT20 and RT30 extrapolation methods to accurately compute the RT60 value. Measurement Methods: Impulse Method: Measures the room's response to a sudden sound, such as a hand clap or balloon burst. Interrupted Noise Method: Generates a controlled noise signal (Pink/White Noise) through external speakers and measures the decay once the source is cut off. Disclaimer: While RevMeter Pro has been calibrated against professional-grade equipment, it is intended for educational and reference purposes only. It should not replace certified hardware for critical professional certification. The author assumes no liability for damages resulting from the use of this software.

About

GEJOScan

Read full description

GJS Streaming App Inspection no longer means: one sees it – everyone else guesses. With the GJS app, your work becomes visible. For clients. Colleagues. Decision-makers. Inspection no longer means one sees it – everyone else guesses. With the GJS app, your work becomes visible to clients, colleagues and decision-makers. Live feed. Sensor data. Controls – right on your iPhone or iPad. No replugging. No cable chaos. No back-and-forth. Get feedback faster – and get straight to the point. ------- Your inspection system – now mobile on iOS. What can you do with it? Everything: • Live video on any iOS device • Real-time sensor data (laser measurement, inclination, rotation…) • Control the camera head (pan, rotate, shutter) • Take a screenshot – share instantly via messenger, email or cloud • Let clients or coworkers follow along – no extra hardware needed ------- A real-life example: You’re in the basement, kneeling down. The camera’s deep in the pipe. One hand on the push rod. The other holding your iPhone. On screen: the live feed – straight from the pipe. Five meters behind you: the control unit. In front of it: the site manager – watching live. No need to shout. No need to explain. He sees what you see. In real time. Before, you would’ve been alone. Or running back and forth. Now, you stay where it matters – fully in control. ------- Compatible with: • GJS inspection systems with the latest PELI control unit • iPhone & iPad • Real-life job sites – indoor and outdoor ------- Why GJS built this? Because we know how things work in the field. Because we don’t do things halfway. Because you need a real tool – not a toy. ------- Download for free – and work differently starting tomorrow.

Screenshots

RevMeter Pro4 screens
GEJOScan4 screens

Verdict

The call

The clearest difference is price: GEJOScan at Free against RevMeter Pro's $6.99. GEJOScan also leads on device support (3 vs 1) and iOS requirement (15.6 vs 17.6). On ads and in-app purchases 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

GEJOScan is free to download; RevMeter Pro costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard3 real differences · 7 level
RevMeter Pro versus GEJOScan: the parameters behind the verdict, then further details
ParameterRevMeter ProGEJOScan
Price$6.99Free — better
Rating2.2 (5 ratings) — better—
Positive reviews26.3% of reviews—
Number of ratings5 — better—
Update frequencyEvery 4 months—
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.615.6 — better
Further details — not scored
Size7 MB37 MB
Age rating4+4+
DeveloperMatthias SchorerGJS Inspektionssysteme

In-app purchases

None

RevMeter Pro

No in-app purchases

None

GEJOScan

No in-app purchases

Questions

Is RevMeter Pro free?
RevMeter Pro costs $6.99, with no in-app purchases.
Is GEJOScan free?
GEJOScan is free to download, with no in-app purchases.
Do RevMeter Pro or GEJOScan have ads?
Neither RevMeter Pro nor GEJOScan shows ads.

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