Comparison

Scale Master 2.0 vs Simple Sentence Maker Pro SLP

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

Head to head
About

Scale Master 2.0

This app helps musicians improve their tuning accuracy and speed. It uses droning sounds to practice intonation and visually highlights scale patterns for easy recognition. Ideal for both aspiring and professional musicians, as well as educators.

Highlights
  • Droning sound practice for intonation
  • Visual scale pattern highlighting
  • Supports various scale modes
  • Scale auto-play function
  • Real-time interval generation
  • 780 droning renderings
  • 420 scale configurations
Features
Read full description

Train your ears. Strengthen your intonation. Play with greater confidence. Scale Master helps musicians develop a more reliable sense of pitch by turning intonation into something you can clearly hear, feel, and practice. Whether you sing, play a wind or string instrument, rehearse an ensemble, or teach music, Scale Master provides a steady tonal reference that makes focused listening easier. Practice with a sustained root and justly tuned interval to hear when two notes truly resonate. As your pitch settles into place, beating is reduced and the sound becomes clearer—helping you learn the sensation of playing in tune, not merely watching a tuner. Switch to scale practice to build dependable pitch placement across keys. Hear each scale ascend and descend while following its pattern on screen, then work at your own pace with adjustable tempo, note length, repetition, and metronome support. Scale Master can help you: • Recognize and correct intonation more quickly • Hear the resonance of well-tuned intervals • Develop stronger interval and scale awareness • Improve ensemble balance and harmonic listening • Practice confidently with a stable tonal center • Demonstrate pitch relationships clearly to students Choose your concert root, octave, transposing instrument, enharmonic spelling, and pitch calibration to create a practice environment that fits your music. Use Scale mode for consistent equal-tempered pitch placement, or Drone mode to explore the resonance of just intonation. Included scales cover essential material such as major, natural minor, harmonic minor, blues, whole tone, chromatic, and pentatonic scales. An optional Jazz Modes upgrade adds Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, and Locrian modes. Designed by a professional musician and educator, Scale Master is a practical ear-training companion for students, teachers, ensemble directors, and experienced performers who want to hear more deeply—and play more beautifully in tune.

About

Simple Sentence Maker Pro SLP

An educational game designed to help children with special needs learn simple sentence structure. It uses pictograms and fun animations to build vocabulary and stimulate language development, making it ideal for toddlers, preschoolers, and those with autism spectrum disorder.

Highlights
  • Learn simple sentence structure (subject, verb, object)
  • Build vocabulary with pictograms
  • Stimulate language development
  • Graduated difficulty levels
  • Funny animations for engagement
  • Ideal for children with autism
Features
Read full description

An educational matching game, perfect to help children with special needs. Easy-to-use app, to learn how to make simple sentence structure ( subject, verb, object ). Perfect for toddlers or preschoolers. Try it with your kid and see his reaction! I bet he will love it... Our app enables the learning of simple sentence structure through games and help build vocabulary. Created by a speech therapist to stimulate language development and acquire base vocabulary, the app also opens the door to the love of reading and writing using pictograms. AN APP VERY APPRECIATED BY SPEECH THERAPISTS WORKING ALONGSIDE YOUNG CHILDREN WITH AUTISM SPECTRUM DISORDER. “I wish to tell you how much I appreciate your iPad app! Even my severely autistic students communication-wise love it! It’s the best app for a speech therapist! I’m eagerly awaiting other for more apps like this :)” — KATHERINE MIKLIS, SPEECH THERAPIST Speech therapy app for iPad to prompt language development with young children. The ideal tool to help children with speech impediments or delay. Created by a speech therapist FUNNY ANIMATIONS TO SUSTAIN THE CHILD'S ATTENTION AND MOTIVATION IT IS NOW POSSIBLE TO GRADUATE THE DIFFICULTY LEVEL Our new app allows to choose between 3 levels of difficulty to enable small-scale improvements. It's also a great tool to learn French as a second language.

Screenshots

Scale Master 2.03 screens
Simple Sentence Maker Pro SLP4 screens

Verdict

The call

The clearest difference is price: Scale Master 2.0 at $1.99 against Simple Sentence Maker Pro SLP's $79.99. Scale Master 2.0 also leads on rating (4.4 vs 3.5) and update cadence (every 2 months vs every 7 months). Simple Sentence Maker Pro SLP's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 87%). 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

Scale Master 2.0 costs $1.99 and Simple Sentence Maker Pro SLP $79.99 up front. Scale Master 2.0 sells 1 one-off in-app purchase. Simple Sentence Maker Pro SLP asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Scale Master 2.0 holds the better App Store score, 4.4 against 3.5. That said, the two scores are not equally well evidenced: Scale Master 2.0 has 23 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 87% of Scale Master 2.0's written reviews are positive against 100% of Simple Sentence Maker Pro SLP's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Scale Master 2.0 ships an update every 2 months, Simple Sentence Maker Pro SLP every 7 months. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

Scorecard8 real differences · 2 level
Scale Master 2.0 versus Simple Sentence Maker Pro SLP: the parameters behind the verdict, then further details
ParameterScale Master 2.0Simple Sentence Maker Pro SLP
Price$1.99 — better$79.99
Rating4.4 (23 ratings) — better3.5 (2 ratings)
Positive reviews86.7% of reviews100.0% of reviews — better
Number of ratings23 — better2
Update frequencyEvery 2 months — betterEvery 7 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.012.0 — better
Further details — not scored
Size6 MB372 MB
Age rating4+4+
DeveloperGil EstesEdition Symbolicone inc.

Customer experience

Scale Master 2.0

All ratings23 ratings
Positive87.0%
Neutral8.7%
Negative4.3%
Written reviews30 reviews
Positive86.7%
Neutral6.7%
Negative6.7%

Simple Sentence Maker Pro SLP

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Scale Master 2.0

One-time1
  • Jazz Modes$0.99
None

Simple Sentence Maker Pro SLP

No in-app purchases

Questions

Is Scale Master 2.0 free?
Scale Master 2.0 costs $1.99, and also offers in-app purchases.
Is Simple Sentence Maker Pro SLP free?
Simple Sentence Maker Pro SLP costs $79.99, with no in-app purchases.
Which has better reviews, Scale Master 2.0 or Simple Sentence Maker Pro SLP?
Scale Master 2.0 is rated higher. Scale Master 2.0 averages 4.4 out of 5 from 23 ratings, while Simple Sentence Maker Pro SLP averages 3.5 from 2 ratings.
Do Scale Master 2.0 or Simple Sentence Maker Pro SLP have ads?
Neither Scale Master 2.0 nor Simple Sentence Maker Pro SLP shows ads.
Which is updated more often, Scale Master 2.0 or Simple Sentence Maker Pro SLP?
Scale Master 2.0 ships an update every 2 months, and Simple Sentence Maker Pro SLP every 7 months. Most recently, Scale Master 2.0 was updated on October 23, 2026 and Simple Sentence Maker Pro SLP on October 21, 2026.

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