Comparison

MMO Range Finder vs iTest.

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

Head to head
About

MMO Range Finder

This app helps Marine Mammal Observers calculate distances between animals and acoustic sources during surveys. It uses trigonometric functions and allows users to input target and source bearings and distances for precise mitigation decisions.

Highlights
  • Calculate distance using trigonometric cosine function
  • Fix compass bearing by pointing device
  • Convert binocular reticules to distance
  • Set up to 3 unique observation locations
  • Save and export sighting data in .csv format
  • Display vessel position, mitigation zone, and sightings on map
  • Customise MMO parameters
Features
Read full description

Marine Mammal Observers mitigate for the potential impact of sound exposure on marine fauna during geophysical surveys, naval active-sonar exercises, UXO clearance or civil engineering projects. This app will assist the MMO making mitigation decisions by calculating the distance from the animal to the source of acoustic interference using a trigonometric cosine function. The MMO simply enters the distance and bearing to the TARGET and SOURCE from their observation position and the app calculates the rest. This app is loaded with features to make allow to keep focused on the detection (See the user manual for a detailed description): Fix compass bearing to animal and source by pointing device and pressing button. Convert binocular reticules to distance by entering the number of reticules between horizon and animal and pressing the reticule button (per formulae in Lerczack and Hobbs, 1998). Set up to 3 unique observation locations to define height above sea level (required for accurate reticule conversion). Save data to the log for each sighting and export in .csv format for your own mapping and analyses needs. Shows vessel position, mitigation zone and projected fauna sightings on the map. Map also displays latitude, longitude, course and speed. Press the radar button and the map will orientate to the vessel point of view. Sightings labels will be updated live with the distance to source and the bearing from the vessel for ease of re-sighting. Fully customise the MMO parameters. Specify anything from your binocular MILs per reticule, mitigation zone size, choose a ramform hull as your maps ship symbol and much much more! Disclaimer: MMO Range Finder App should be used as a reference tool and is only as precise as the users ability to range find. Any decision making is the responsibility of the user. If in use, the compass and GPS location should be verified often.

About

iTest.

Easily test your device's hardware and software without navigating multiple apps or complex settings. Offers guided and manual test modes with clear instructions and results. Ideal for assessing a device's condition before buying or selling.

Highlights
  • Guided semi-automatic test mode
  • Manual test selection
  • Easy-to-understand instructions
  • Clear test results
  • Shareable test reports
  • Used device assessment
Currently charting
Read full description

iTest lets you easily test a device without the need to use multiple apps or dive though various system settings. Providing you with the convenience of both a guided semi-automatic test mode and a list of tests to choose from. With easy to understand instructions and results. Share your results to a perspective buyer or test a used device before buying. iTest can help you make a more informed decision of a devices condition.

Screenshots

MMO Range Finder4 screens
iTest.4 screens

Verdict

The call

The clearest difference is rating: MMO Range Finder at 5.0 against iTest.'s 4.4. MMO Range Finder also leads on review sentiment (100% vs 84%). iTest.'s advantage is monetization model (free vs paid) and ratings volume (50 vs 1). On price, update cadence, 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

MMO Range Finder costs $0.99 and iTest. $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

MMO Range Finder holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: iTest. has 50 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of MMO Range Finder's written reviews are positive against 84% of iTest.'s.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

Scorecard5 real differences · 6 level
MMO Range Finder versus iTest.: the parameters behind the verdict, then further details
ParameterMMO Range FinderiTest.
Price$0.99$0.99
Rating5.0 (1 ratings) — better4.4 (50 ratings)
Positive reviews100.0% of reviews — better84.1% of reviews
Number of ratings150 — better
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank—#197 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.39.0 — better
Further details — not scored
Size43 MB22 MB
Age rating4+4+
DeveloperJames KeatingHugh Jeffreys

Customer experience

MMO Range Finder

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

iTest.

All ratings50 ratings
Positive88.0%
Neutral6.0%
Negative6.0%
Written reviews107 reviews
Positive84.1%
Neutral5.6%
Negative10.3%

Bugs and requests

MMO Range Finder

Not enough reviews yet to summarise bugs or requests.

iTest.

Reported bugs

16 issues
  • Light sensor test fails on multiple device models despite hardware functioning
  • App crashes on startup for iOS 12 devices and older
  • App crashes on iPod Touch 6th generation
  • App crashes on iPad Mini 2
  • Speaker test produces no sound on iPhone 16 Pro/Pro Max
Show 11 more
  • Microphone test fails on iPhone 16 despite working hardware
  • Vibration test non-functional on iPhone 16
  • NFC test reports iOS version not supported on iOS 18.4.1
  • Proximity sensor test gives false negatives on iPhone 11 Pro
  • Camera test shows black screen despite camera permissions granted
  • Compass test fails despite working hardware
  • Camera test opens touchscreen test instead on some devices
  • Screen burn-in test displays clock and navigation bars
  • Digitizer test feels inaccurate
  • UI buttons don't match actual function on iPad
  • Accessibility issues with large font sizes blocking button interaction

Requested features

17 requests
  • Battery health and cycle count information
  • LiDAR sensor test
  • GPS functionality test
  • Service history check
  • Battery aging/degradation test
Show 12 more
  • Support for older iOS versions (iOS 11 and below)
  • Mac app version
  • Apple Watch testing support
  • AirPods testing capability
  • CPU monitoring and RAM usage display
  • Network data monitoring
  • Detailed camera quality test with white background
  • Fake call test for earpiece audio
  • Apple Pencil testing
  • Screen burn-in test in full-screen mode
  • Individual microphone quality testing
  • Wireless charging test

In-app purchases

None

MMO Range Finder

No in-app purchases

None

iTest.

No in-app purchases

Questions

Is MMO Range Finder free?
MMO Range Finder costs $0.99, with no in-app purchases.
Is iTest. free?
iTest. costs $0.99, with no in-app purchases.
Which has better reviews, MMO Range Finder or iTest.?
MMO Range Finder is rated higher. MMO Range Finder averages 5.0 out of 5 from 1 ratings, while iTest. averages 4.4 from 50 ratings.
Do MMO Range Finder or iTest. have ads?
Neither MMO Range Finder nor iTest. shows ads.
Which is updated more often, MMO Range Finder or iTest.?
MMO Range Finder ships an update every 2 months, and iTest. every 2 months. Most recently, MMO Range Finder was updated on October 24, 2026 and iTest. on October 27, 2026.

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