Scale Study vs Dodast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Scale Study
Improve your piano scale technique by practicing tempo and accuracy. Connect a MIDI keyboard to log your fastest clean tempos and track progress over time. A tapping mode is available for rhythm practice without a keyboard.
- Practice scales with MIDI keyboard
- Log fastest accurate tempos
- Track progress over time
- Focus on speed and accuracy
- Rhythm and timing tapping mode
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Piano scale practice is a core part of building technique, but improving means more than playing the right notes. You need to increase tempo while staying accurate and in control. Scale Study helps you practice scales and improve your tempo in a clear and measurable way. Connect a MIDI keyboard or digital piano and play your scales as usual. The app listens to your playing, confirms when a scale is correct, and records the fastest tempo you can play it cleanly. This helps you see which scales are improving and which need more work. You can start slowly to build accuracy, then increase the tempo over time. Scale Study keeps a record of your progress so you can see your speed improve through regular practice. Practice Anywhere mode is also included for when you do not have a keyboard. This is a simple tapping mode that helps you practice rhythm and timing, but the full scale detection and tempo tracking requires a MIDI keyboard. Features • Practice major and minor scales using a MIDI keyboard • See the fastest tempo you can play each scale accurately • Track your progress over time • Focus on both speed and accuracy • Practice Anywhere tapping mode for rhythm and timing This is useful for piano students preparing for exams such as ABRSM, and for anyone who wants to improve their scale tempo and overall technique. Scale Study is a small, focused app made by an independent developer. I am Shane, and I read every review and message. The goal is simple. Help you improve your scales and increase your tempo through regular, focused practice. Try it free, then upgrade with a yearly or lifetime purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Dodast
This app transforms multiple phones into a synchronized speaker system for offline music and video playback. It allows users to share audio and video experiences simultaneously across devices without needing a network connection, offering individual volume control for each participant.
- Synchronized playback across multiple phones
- Offline music and video player
- Wi-Fi or hotspot connectivity
- Individual volume control
- Playlist creation and management
- Equalizer and sleep timer
- Background playback and lock screen controls
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Start a silent disco with the phones already in the room. Dodast is an offline music player and video player for the files on your device, and it syncs playback across phones so everyone hears the same song at the same moment, each on their own headphones or all together as one big speaker. SYNC MUSIC ACROSS PHONES One phone hosts. Guests join over the same Wi-Fi, or over the host's hotspot when there is no network around. They are found automatically under Nearby, or they scan a QR code. From that moment every device plays in step as one. Stack phones into a fuller, louder speaker setup and fill a kitchen, a backyard, a tent or a car. No Bluetooth speaker needed. SILENT DISCO ON YOUR OWN HEADPHONES Everyone on the same song at the same moment, nobody disturbing the neighbors. Each guest listens on their own headphones, sets their own volume and can nudge the sync timing by hand if a device runs a hair ahead or behind. Perfect for a dorm, a hostel, an apartment with thin walls or a party that has to stay silent. WATCH TOGETHER, HEAR IT ON EVERY PHONE Put a video on one screen and let the whole room hear it in sync, each on their own headphones. One device carries the picture, every other phone carries the sound. Made for the moments a speaker would ruin: a show after the house is asleep, a late movie in a shared room, anywhere everyone wants their own volume. A REAL OFFLINE MUSIC PLAYER Dodast is a local music player you would use every day, sync or not. It scans the MP3, FLAC, WAV, M4A and other audio and video files already on your iPhone, reads tags and album art, then stays out of your way. • Browse by songs, albums, artists and folders • Build playlists and reorder them freely • Fast search across your whole library • Crossfade between songs • Sleep timer for the end of the night • Background playback and lock screen controls • Home Screen and Lock Screen widgets • 20 languages • Works with no internet connection at all THE MUSIC ALREADY ON YOUR IPHONE Dodast plays the music library already on your iPhone: the songs you bought and downloaded, tracks you imported from your Mac or PC, files saved in the Files app, and anything shared to Dodast from another app. Years of collecting, finally playing on every phone in the room at once. No more passing one earbud back and forth. Music from a streaming subscription stays protected by its provider and cannot be played by any third-party app. NO ACCOUNT, NO CLOUD Nothing is uploaded to a server. The phones connect directly to each other on your local network. No account, no sign-up. WHAT YOU NEED • Dodast installed on each iPhone or iPad • A shared Wi-Fi network, or one device acting as a hotspot • Your own music and video files Great for road trips, house parties, picnics, dorm rooms, hotel rooms, camping, study sessions and late night movie nights. Any moment worth hearing together. Line up the phones. Press play together. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Scale Study at none against Dodast's shown. On price, rating, ratings volume and update cadence 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
Both are free to download. Scale Study sells 2 in-app purchases, starting at $0.99 per year and Dodast sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Scale Study against 5.0 for Dodast. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Scale Study ships an update every 2 weeks, Dodast every 3 weeks. Both last shipped on October 31, 2026.
| Parameter | Scale Study | Dodast |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 75 MB |
| Age rating | 4+ | 12+ |
| Developer | Diem Limited | Mohammad Khakpaki |
Customer experience
Scale Study
Dodast
In-app purchases
Scale Study
- Scale Study Annual Subscription$0.991 Year
- Scale Study Lifetime Purchase$2.99
Dodast
- premium$0.997 Days
- premium$9.991 Year
- Premium$19.99









