Comparison

LARSA Analyzer vs VAPolyTZFM

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

Head to head
About

LARSA Analyzer

This tool measures and analyzes impulse responses for audio systems like loudspeakers and home theaters. It helps you tune your audio setup for optimal performance in any listening environment, bringing professional-level analysis to your mobile device.

Highlights
  • Impulse response measurement
  • IR averaging
  • IR windowing
  • Energy Time Curves
  • Delay time calculation
  • Save and recall measurements
  • iCloud support
Features
Read full description

LARSA, or Loudspeaker And Room System Analyzer, is a powerful impulse response measurement and analysis tool. It is ideally suited for measuring loudspeakers in rooms, multi-speaker setups, car audio systems, home theater systems or larger, installed loudspeaker systems. It is an easy way to profile a system and give you the information you need to equalize or tune your loudspeakers for the best possible performance in your listening space. LARSA brings measurement power and convenience previously available only on desktop computers. Key Features of LARSA include: * Easy-to-learn single-tap recording of an impulse response. * IR averaging features. Perform test/re-test analyses of measurements or a make a spatial average. * IR windowing features. * Energy Time Curves. * Delay time calculation for time-alignment in bi- and tri-amp applications. * Save and recall functionality. * Full iCloud support for easy access to your measurements on your desktop or laptop.

About

VAPolyTZFM

This app is a polyphonic synthesizer that utilizes Through Zero FM for musical sound generation. It offers a standalone mode with Ableton Link and MIDI support, as well as an AudioUnit Extension for use with other music software. Built-in effects and iCloud Drive integration enhance its creative capabilities.

Highlights
  • Through Zero FM synthesis
  • AudioUnit Extension (AUv3) support
  • Ableton Link and MIDI connectivity
  • Built-in effects suite
  • iCloud Drive project sharing
  • Analog style step sequencer
  • Up to 8 voice polyphony
Features
Read full description

VAPolyTZFM is polyphonic synthesizer featuring Through Zero FM, which is a type of linear frequency modulation and it is capable to maintain the pitch therefore it can deliver more musical results. VAPolyTZFM operates as a stand alone or as an AudioUnit Extension (AUv3) for iPhone, iPad and Mac. Stand Alone supports Ableton Link, MIDI and audio file export. Built-in Effects include delay, chorus, flanger, reverb, eq and compressor. Project files can be saved in iCloud Drive, so that the project can be accessed from iPhone, iPad or Mac. Main Features Through Zero FM Analog Style Step Sequencer. Eight Assignable Controllers. Maximum 8 voice polyphony. it depends on performance of the device it is running. Built-in effects and piano roll sequencer. Audio Export. Linear PCM format (AIFF, WAV and CAF) and compressed format (AAC) Support Audio Unit Extension (AUv3). Support MIDI 2.0. Support Foot Pedal and Per Note Control. Support Ableton Link, Bluetooth MIDI, MIDI In / Out. Works on iPhone, iPad and Mac. Support iCloud Drive to share project files between the platforms. Include 256 Factory Presets. Improvements Support MIDI Foot Pedal (CC#11, CC#64) Support MIDI2.0 Per Note Control Messages MIDI CC Settings are saved. It will be recovered when the app launched in the next time. System Requirements iOS 17.0 or later Devices with Apple Silicon are recommended. A13 Fusion or above is highly recommended. if sound is distorted when using a device with less CPU power, reduce number of voices. AudioUnit Extension (AUv3) requires host application which support AudioUnit Extension. AudioUnit Extension is supported by Apple Logic and Apple Garage Band on iOS and macOS. For any other DAW, it depends on the application and some of them don’t support AudioUnit Extension.

Screenshots

LARSA Analyzer3 screens
VAPolyTZFM4 screens

Verdict

The call

The clearest difference is price: VAPolyTZFM at $5.99 against LARSA Analyzer's $29.99. VAPolyTZFM also leads on rating (5.0 vs 4.3) and in-app purchases (none vs 1). On review sentiment, ratings volume, update cadence and ads 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

LARSA Analyzer costs $29.99 and VAPolyTZFM $5.99 up front. LARSA Analyzer sells 1 one-off in-app purchase. VAPolyTZFM asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

VAPolyTZFM holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews split almost evenly too, at 50% and 50% positive.

UpkeepUpdate frequency

LARSA Analyzer ships an update every 6 months, VAPolyTZFM every 9 months. The most recent releases landed on September 23, 2026 and September 6, 2026 respectively.

Scorecard3 real differences · 7 level
LARSA Analyzer versus VAPolyTZFM: the parameters behind the verdict, then further details
ParameterLARSA AnalyzerVAPolyTZFM
Price$29.99$5.99 — better
Rating4.3 (3 ratings)5.0 (3 ratings) — better
Positive reviews50.0% of reviews50.0% of reviews
Number of ratings33
Update frequencyEvery 6 months — betterEvery 9 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better16.6
Further details — not scored
Size48 MB17 MB
Age rating4+4+
DeveloperAndrew SmithRyo Togawa

Customer experience

LARSA Analyzer

All ratings3 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

VAPolyTZFM

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

1 purchases

LARSA Analyzer

One-time1
  • Filter Design Option$9.99
None

VAPolyTZFM

No in-app purchases

Questions

Is LARSA Analyzer free?
LARSA Analyzer costs $29.99, and also offers in-app purchases.
Is VAPolyTZFM free?
VAPolyTZFM costs $5.99, with no in-app purchases.
Which has better reviews, LARSA Analyzer or VAPolyTZFM?
VAPolyTZFM is rated higher. LARSA Analyzer averages 4.3 out of 5 from 3 ratings, while VAPolyTZFM averages 5.0 from 3 ratings.
Do LARSA Analyzer or VAPolyTZFM have ads?
Neither LARSA Analyzer nor VAPolyTZFM shows ads.
Which is updated more often, LARSA Analyzer or VAPolyTZFM?
LARSA Analyzer ships an update every 6 months, and VAPolyTZFM every 9 months. Most recently, LARSA Analyzer was updated on September 23, 2026 and VAPolyTZFM on September 6, 2026.

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