Comparison

Sing vs ScaleCoach Pro

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

Head to head
About

Sing

Visualize your singing or instrument playing pitch with a color-coded graph. This app analyzes audio input to show if you are on, sharp, or flat, helping you train your ear for accurate intonation.

Highlights
  • Color-coded pitch graph
  • Real-time audio analysis
  • Visualizes pitch accuracy
  • Supports singing and instruments
  • Pitch frequency spectrum display
  • Monophonic pitch detection
Features
Read full description

Can you sing in tune? Learn to sing (or play an instrument) accurately in tune with HotPaw Sing-inTuna's color-coded pitch graph. Sing-inTuna uses the built-in microphone on your iPhone or iPad to analyze and help you visualize if you are singing, or playing a musical instrument (such as a violin), precisely on the right pitch. It graphs pitch on a scrolling graph resembling a musical Grand Staff. Tones that are on-pitch (+-20 cents) are colored green; notes slightly sharp: red; notes a pinch flat: blue. You can also display an optional pitch frequency spectrum of your voice to see your timbre. Sing-inTuna requires a quiet environment with no accompaniment or harmony, and monophonic pitches that are at least a quarter second long. The pitch range using the built-in mic is about +-2 octaves from middle-C, depending on microphone use, loudness, and timbre. Note: This app produces no sounds and shows no sheet music. It only listens so that you can see your pitch, and how well your pitch matches that of a well tuned equal-temperament instrument.

About

ScaleCoach Pro

This app helps musicians master scales and arpeggios with instant pitch detection. It offers various scale modes, custom scale programming, and a polyphonic piano with adjustable tuning. Users can test their intonation and receive feedback on accuracy.

Highlights
  • Major and Melodic Minor scale modes
  • Custom scale and melody programming
  • Polyphonic piano with 7 octaves
  • Adjustable tuning (415-466 Hz)
  • Built-in metronome
  • Pitch detection and intonation feedback
  • S.W.Y.P. (See What You Play) feature
Features
Read full description

ScaleCoach is designed for instant pitch detection based scale/arpeggio training. ScaleCoach is a high-end app, that will help you master all the scales you need, in an easy and entertaining way.   ScaleCoach is an important tool in teaching music. Train alone or challenge each other. Who can hit it spot on!   ScaleCoach is your new musical best friend.   On our website scalecoach.com you will find out more about this outstanding app and see a demonstration. FEATURES - Major modes - a collection of diatonic scales from the Major mode - Melodic Minor modes - collection of the scales from Mel. Minor mode - Symmetric + collection of symmetric scales and Blues, Pentatonic etc. - Program your own scales or melodies and save them. - 7 octaves of grand piano - Polyphonic piano - Master tuning from 415 - 466 Hz  - Built-in metronome - Tempo conversion from 20-480 notes per minute - Note names on/off - Preplay note on/off - Play scales up or down // up-down or down-up - Move scales up - down - repeat - play once - S.W.Y.P. "See What You Play" either as single tone or multiple tones - S.W.Y.P. includes on screen Hz detector - Score 0-100 point - 7 languages ScaleCoach is the first and only app that lets you play all the scales and at the same time check your intonation.   When you have learnt your scale you can test yourself and see if your intonation is correct. You will get feedback whether you sing or play either a false note or in tune. DESCRIPTION Intonation forms part of the basis in music when you're playing by yourself or with others. It is therefore very valuable to be able to test your intonation and with ScaleCoach you can test it with any instrument.   That includes all fretless instruments as violin, chello, double-bass and all other instruments as trumpet, saxophone etc. The singers can learn how to sing in tune. ScaleCoach will support you regardless of your level and let you choose the tempo. In the S.W.Y.P (See What You Play), you will be able to see what you sing or play on the ScaleCoach piano. B or H? With ScaleCoach you can have them both. Play wirelessly from your device to your Apple TV and AirPlay-enabled speakers and share your masterpiece in coaching yourself and music buddies.

Screenshots

Sing1 screens
ScaleCoach Pro4 screens

Verdict

The call

The clearest difference is rating: Sing at 3.0 against ScaleCoach Pro's 2.0. Sing also leads on update cadence (every 6 months vs every 36 months) and review sentiment (63% vs 50%). ScaleCoach Pro's advantage is price ($3.99 vs $4.99). On ratings volume, ads, in-app purchases and monetization model 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

Sing costs $4.99 and ScaleCoach Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sing holds the better App Store score, 3.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 63% of Sing's written reviews are positive against 50% of ScaleCoach Pro's.

UpkeepUpdate frequency

Sing ships an update every 6 months, ScaleCoach Pro every 36 months. The most recent releases landed on October 29, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
Sing versus ScaleCoach Pro: the parameters behind the verdict, then further details
ParameterSingScaleCoach Pro
Price$4.99$3.99 — better
Rating3.0 (2 ratings) — better2.0 (2 ratings)
Positive reviews62.5% of reviews — better50.0% of reviews
Number of ratings22
Update frequencyEvery 6 months — betterEvery 36 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.6
Further details — not scored
Size2 MB8 MB
Age rating4+4+
DeveloperHotPaw ProductionsHans Toft-Olsen

Customer experience

Sing

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews16 reviews
Positive62.5%
Neutral6.3%
Negative31.3%

ScaleCoach Pro

All ratings2 ratings
Positive0.0%
Neutral50.0%
Negative50.0%
Written reviews4 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

In-app purchases

None

Sing

No in-app purchases

None

ScaleCoach Pro

No in-app purchases

Questions

Is Sing free?
Sing costs $4.99, with no in-app purchases.
Is ScaleCoach Pro free?
ScaleCoach Pro costs $3.99, with no in-app purchases.
Which has better reviews, Sing or ScaleCoach Pro?
Sing is rated higher. Sing averages 3.0 out of 5 from 2 ratings, while ScaleCoach Pro averages 2.0 from 2 ratings.
Do Sing or ScaleCoach Pro have ads?
Neither Sing nor ScaleCoach Pro shows ads.
Which is updated more often, Sing or ScaleCoach Pro?
Sing ships an update every 6 months, and ScaleCoach Pro every 36 months. Most recently, Sing was updated on October 29, 2026 and ScaleCoach Pro on October 13, 2026.

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