Comparison

iTuningFork vs Sparkle

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

Head to head
About

iTuningFork

This app generates various audio waveforms and frequencies for tuning musical instruments or testing electronic equipment. It offers selectable waveforms, adjustable frequencies, and features like looping tones and real-time volume/timbre editing.

Highlights
  • Selectable waveforms (sine, square, triangle, saw, white noise)
  • Frequency range from 5Hz to 22000Hz
  • Instrument-specific tone scales
  • Looping tones with adjustable timeout
  • Real-time volume and timbre editing
  • 9-octave tone keyboard
  • Ultrasonic multifrequencies for pest repellent
Features
Read full description

"iTuningFork - Tone Generator" is a tone generator (signal generator) for tuning musical instruments or for testing electronic equipments. The signal generator is an electrical / electronic device capable of generating an electrical signal with waveforms types and frequencies selectable by the user. Music industry: "ITuningFork - Tone Generator" works like a tuning fork. The program preset tones, different for each type of instrument, simplify the operations required for tuning musical instruments. You have to select the musical instrument you want to tune and "iTuningFork - Tone Generator" will automatically generate the full tone scale for the selected musical instrument. You can play the single key/tone/note, or you can "Play Loop" to activate all the preset tones in sequence for the selected instrument. In this case, the "Timeout" setting determines the duration of each tone in the automatic sequence of tones for the selected musical instrument. Volume and timbre can also be edited while playing a tone; you can thus obtain special effects of shifting the tone frequency in real time. Volume control allows you to adjust the exact audio intensity for the playing tone and allow you to tune your music instrument more easily. The “Notes Duration” controls allow you to decide whether the notes should only be played until the button is pressed or continuously until you press "Stop", or with a fixed timeout adjustable in seconds. It is also available the 9-octave tones keyboard for each waveform selected to play the desired note. Electronic industry: Signals generators are typically used in three ways: - in the testing of electrical and electronic circuits - as a process control device - as a sample instrument Circuit Verification: the equipment provides a precise signal chosen by the user to the circuit to be verified: the analysis of how the circuit elaborates it, and the comparison of what was theoretically expected, give to the analyst details about the correct operation of the circuit. Circuit Control: the generated signal is used as a reference to control the output process of the circuits Sampling instrument: a particular variant of the use of signal generators in testing is when used as a sample capable of generating a known, stable and defined electrical signal with relatively low uncertainty to be used as a reference for calibration of electrical instrumentation. Technical features: 1) Signals generator with selectable waveforms: - Sine waveform - Square waveform - Triangular waveform - Saw waveform - White Noise waveform 2) Signals generator with selectable frequencies: - From 5Hz to 22000Hz (some low frequencies or high frequencies tones can not be heard using the internal speaker of the portable device... for these tones, you must use an external audio amplifier or a specific equipment) 3) Repulsive ultrasonic multifrequencies: repellent for mosquito / flies / mice / animals that hates ultrasounds.   Application Type: - UNIVERSAL APP (pay it only once and runs on all your devices)

About

Sparkle

Transform audio by transferring the temporal structure of one sound to another while preserving spectral properties. Create unique sound transformations with advanced spectral hybridization algorithms. Ideal for musicians and sound designers seeking innovative audio manipulation.

Highlights
  • Spectral hybridization
  • Envelope preservation
  • Phase-sync processing
  • High-quality sound transformations
  • Temporal structure transfer
  • Spectral property preservation
Features
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Sparkle is a tool for advanced spectral hybridizations made of several algorithms that operate on frequency domain. By means of envelope preservation and phase-sync processing it can creates high-quality sound transformations. The basic idea is to transfer the temporal structure of a sound (source) onto another sound (target) of which the spectral properties are preserved. Simply put, you can take a voice and make it sing a Beethoven’s symphony!

Screenshots

iTuningFork4 screens
Sparkle4 screens

Verdict

The call

The clearest difference is review sentiment: Sparkle at 96% against iTuningFork's 0%. Sparkle also leads on rating (5.0 vs 1.6) and update cadence (every 6 weeks vs every 56 months). iTuningFork's advantage is price ($1.99 vs $9.99). On ads, in-app purchases, monetization model 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

iTuningFork costs $1.99 and Sparkle $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sparkle holds the better App Store score, 5.0 against 1.6. That said, the two scores are not equally well evidenced: Sparkle has 48 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of iTuningFork's written reviews are positive against 96% of Sparkle's.

UpkeepUpdate frequency

iTuningFork ships an update every 56 months, Sparkle every 6 weeks. The most recent releases landed on October 16, 2026 and October 21, 2026 respectively.

Scorecard5 real differences · 5 level
iTuningFork versus Sparkle: the parameters behind the verdict, then further details
ParameteriTuningForkSparkle
Price$1.99 — better$9.99
Rating1.6 (5 ratings)5.0 (48 ratings) — better
Positive reviews0.0% of reviews95.8% of reviews — better
Number of ratings548 — better
Update frequencyEvery 56 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.6 — better17.0
Further details — not scored
Size3 MB37 MB
Age rating4+4+
DeveloperGianluca NataliniapeSoft

Customer experience

iTuningFork

All ratings5 ratings
Positive0.0%
Neutral20.0%
Negative80.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Sparkle

All ratings48 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews24 reviews
Positive95.8%
Neutral0.0%
Negative4.2%

In-app purchases

None

iTuningFork

No in-app purchases

None

Sparkle

No in-app purchases

Questions

Is iTuningFork free?
iTuningFork costs $1.99, with no in-app purchases.
Is Sparkle free?
Sparkle costs $9.99, with no in-app purchases.
Which has better reviews, iTuningFork or Sparkle?
Sparkle is rated higher. iTuningFork averages 1.6 out of 5 from 5 ratings, while Sparkle averages 5.0 from 48 ratings.
Do iTuningFork or Sparkle have ads?
Neither iTuningFork nor Sparkle shows ads.
Which is updated more often, iTuningFork or Sparkle?
iTuningFork ships an update every 56 months, and Sparkle every 6 weeks. Most recently, iTuningFork was updated on October 16, 2026 and Sparkle on October 21, 2026.

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