Comparison

Tone Generator Ultra vs Audio Object

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

Head to head
About

Tone Generator Ultra

Generate a wide range of audio test tones and frequencies, from sine waves to white noise. Ideal for audio system calibration, speaker testing, and acoustic analysis. Offers advanced features like chromatic pitch detection and sweep utilities.

Highlights
  • Sine, Square & Sawtooth Wave Generation
  • Chromatic pitch detection
  • White and pink noise generation
  • Multi-tone generator
  • Logarithmic / linear sweep utility
  • Frequency range 20Hz to 22kHz
Read full description

Tone Generator Ultra is a simple and easy-to-use test tone and frequency generator. Tones can be set by frequency or musical note. Features: -Sine, Square & Sawtooth Wave Generation -Chromatic pitch detection from external sources -Configurable A4 callibration -White and pink noise -Multi-tone generator -Impulse wave -Supports frequencies from 20Hz to 22kHz -Logarithmic / linear sweep utility with adjustable upper and lower frequencies and delay Tone Generators are very useful for a variety of tasks including: - Balancing your Stereo or Home Cinema System - Testing Speakers - Acoustics testing - White and Pink Noise Generator Can be used inconjunction with PocketRTA Ultra Spectrum Analyzer for the iPhone. Or for fun - Compare your friends hearing, see who is straining to hear the sounds - Annoy your best friend with that pesky sound. - But definately not to be used to annoy your teachers.

About

Audio Object

This pocket-sized instrument turns your iPhone into a portable music creation studio. It features a four-track looper, a three-voice drum machine, and an eight-pad sampler with extensive editing capabilities. Seamlessly integrate with your Mac DAW via USB for professional workflows.

Highlights
  • Four-track looper with bar-quantized recording
  • Three-voice drum machine click track
  • Eight-pad sampler with EQ and varispeed
  • Project save, load, and WAV stem export
  • Stereo audio streaming to Mac DAWs via USB
  • MIDI clock output over USB
  • Records stereo from Core Audio interfaces
Features
Read full description

Audio Object is a pocket-sized music instrument for iPhone. It looks and works like a small piece of hardware — a wooden body with an instrument panel on each face. Pull the wood edge and the body rotates to the next face. WHAT IT DOES - Four-track looper with bar-quantized recording and per-loop trim - Three-voice drum machine as the click track — kick, snare, hi-hat with a per-step accent grid - Eight-pad sampler with grid, auto, and tap chopping, two switchable banks, three-band EQ, varispeed tuning - Project save, load, and WAV stem export with tempo map - Streams audio to any Mac DAW over USB (Inter-Device Audio & MIDI) - Sends MIDI clock over USB — Ableton, Logic, and Bitwig lock transport to the phone - Records stereo from any Core Audio interface (iRig, Focusrite, MOTU, and others) HOW IT WORKS Six faces. Perform pads on one, sampler on another, click and time signature on a third, projects on the back, I/O on top, master on the bottom. No menus, no tabs. Every control lives on the body. The click track is not a metronome. It is a three-voice drum machine with per-step accents, subdivisions from quarter notes to swing, and time signatures from 3/4 to 12/8. Set up a kick-snare-hat pattern, press record, loop on the beat. The sampler holds eight pads across two banks. Record from the mic or load from Files. Chop by grid, by transient, or by tapping markers. Each pad carries a three-band EQ, varispeed pitch, and an amplitude envelope. All eight play polyphonically. Recording quantizes to the bar, the beat, or runs free. A dedicated loop-adjust face trims each loop to the sample — drag the region brackets, snap to the grid, hear the result while the brackets move. Plug the phone into a Mac over USB. Audio Object appears as an audio input and MIDI clock source. The DAW locks transport to the phone's tempo. No drivers, no setup. Plug a USB audio interface into the phone. Audio Object names the device on screen and records through its preamps at up to 48 kHz stereo. WHAT IS NEXT A synthesizer — bass, chord, and lead modes — is in development for the next major release.

Screenshots

Tone Generator Ultra4 screens
Audio Object4 screens

Verdict

The call

The clearest difference is price: Audio Object at Free against Tone Generator Ultra's $1.99. Audio Object also leads on rating (5.0 vs 3.4) and in-app purchases (none vs 1). Tone Generator Ultra's advantage is ratings volume (8 vs 1) and iOS requirement (7.0 vs 17.0). On ads and device support 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

Audio Object is free to download; Tone Generator Ultra costs $1.99 up front. Tone Generator Ultra sells 1 one-off in-app purchase. Audio Object asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Audio Object holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Tone Generator Ultra has 8 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Tone Generator Ultra ships an update every 7 months, Audio Object every 2 months. The most recent releases landed on October 20, 2026 and October 14, 2026 respectively.

Scorecard7 real differences · 3 level
Tone Generator Ultra versus Audio Object: the parameters behind the verdict, then further details
ParameterTone Generator UltraAudio Object
Price$1.99Free — better
Rating3.4 (8 ratings)5.0 (1 ratings) — better
Positive reviews57.5% of reviews—
Number of ratings8 — better1
Update frequencyEvery 7 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPod — betteriPhone
Requires iOS7.0 — better17.0
Further details — not scored
Size3 MB12 MB
Age rating4+4+
Developer4Pockets.comGreen Rose Systems, LLC

Customer experience

Tone Generator Ultra

All ratings8 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews40 reviews
Positive57.5%
Neutral5.0%
Negative37.5%

Audio Object

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

In-app purchases

1 purchases

Tone Generator Ultra

One-time1
  • Unlock Tone Generator Ultra$1.99
None

Audio Object

No in-app purchases

Questions

Is Tone Generator Ultra free?
Tone Generator Ultra costs $1.99, and also offers in-app purchases.
Is Audio Object free?
Audio Object is free to download, with no in-app purchases.
Which has better reviews, Tone Generator Ultra or Audio Object?
Audio Object is rated higher. Tone Generator Ultra averages 3.4 out of 5 from 8 ratings, while Audio Object averages 5.0 from 1 ratings.
Do Tone Generator Ultra or Audio Object have ads?
Neither Tone Generator Ultra nor Audio Object shows ads.
Which is updated more often, Tone Generator Ultra or Audio Object?
Tone Generator Ultra ships an update every 7 months, and Audio Object every 2 months. Most recently, Tone Generator Ultra was updated on October 20, 2026 and Audio Object on October 14, 2026.

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