Clef Trainer Grid Downloads & RevenueClef Trainer Grid · App Store
Not in any tracked top chart right now.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperJohn Andersen
CategoryEducation
Price2.99 USD
Released
Rating★ 4.9 (13)
Version1.0.2
Age rating4+
First seen by us
26 Sep 2026
26 Sep 2026📈Dropped out of every chart we track📈Entered the top 100🆕First spotted by AppInsider🆕Released on the App Store
Full timeline · 8 events in the last 12 months
- 📈Clef Trainer Grid dropped out of every chart we trackLast seen 29 Oct
- 📈Clef Trainer Grid entered the top 100Top Paid · Education · US
- 📈Clef Trainer Grid entered the top 100Top Paid · Education · GB
- 📈Clef Trainer Grid charting in a new countryUnited Kingdom
- 📈Clef Trainer Grid entered the top 100Top Paid · Education · CA
- 📈Clef Trainer Grid charting in a new countryCanada
- 🆕Clef Trainer Grid first spotted by AppInsider#5 in Top Paid · Education · United States
- 🆕Clef Trainer Grid released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.9 ★
13 ratings
Measured
Clef Trainer Grid on the App Store
App details
App ID
6749281721
Publisher
John Andersen
On the store since
Aug 2025
1 year on the store
Minimum OS
iOS 15.0+
iPhone 6s and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
3 MB
Also listed in
Music
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.9 ★
13 ratings
Measured
Ratings
13
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.7★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Education apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Clef Trainer Grid
Learn to read sheet music over various clefs!
Practice reading and inputting notes using your finger, plugging a piano keyboard in, or virtually any other instrument using the microphone input mode.
Take your skills outside of the app: Clef Trainer Grid also features a special grid input that scrambles button locations to prevent the building of a muscle memory. This ensures that you're actually learning the note letters, rather than just learning how to use an app!
Still want to learn the piano keys? No worries! You can also switch a classic piano input at any time.
Features also include:
* Support for treble, alto, and bass clefs
* Support for every major and minor key signature
* Support for accidentals—Choose if you want to play outside of the key!
* Adjustable number of ledger lines
* Cheat Mode—View the names of the notes in real-time!
* Dark Mode
* Ghost Note —View miss-input notes on the staff
Practice reading and inputting notes using your finger, plugging a piano keyboard in, or virtually any other instrument using the microphone input mode.
Take your skills outside of the app: Clef Trainer Grid also features a special grid input that scrambles button locations to prevent the building of a muscle memory. This ensures that you're actually learning the note letters, rather than just learning how to use an app!
Still want to learn the piano keys? No worries! You can also switch a classic piano input at any time.
Features also include:
* Support for treble, alto, and bass clefs
* Support for every major and minor key signature
* Support for accidentals—Choose if you want to play outside of the key!
* Adjustable number of ledger lines
* Cheat Mode—View the names of the notes in real-time!
* Dark Mode
* Ghost Note —View miss-input notes on the staff
Latest updates
1.0.2
Added swipe navigation