Endless A vs Strum Machine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Endless A
Easily generate a consistent A-440 pitch for tuning instruments. Select from various instrument sounds to play the reference tone endlessly until you tap to stop. Ideal for musicians needing a reliable tuning reference.
- Endless A-440 pitch generation
- Multiple instrument sound options
- Simple tap-to-play interface
- Reference tone for tuning
- Piano, violin, french horn, sine wave sounds
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A concert A, whenever you need one. Endless A-440 plays a sustained 440 Hz reference tone for tuning instruments. Choose piano, violin, French horn, or a pure sine wave. Tap an instrument to start, switch sounds with a tap, and tap again or use Stop playback to finish. • Four bundled reference sounds • A clear playing indicator and dedicated stop button • Light and dark appearances for iPhone and iPad • An optional original 2015 design • Works offline, with no account, ads, or microphone access This is a reference-tone player. It does not listen to your instrument or measure its pitch.
Strum Machine
Generate realistic backing tracks for practice with real instrument audio. Customize chord progressions, keys, and tempo. Features a large song library, song editor, and band customization options. Works offline and syncs across devices.
- Realistic instrument audio backing tracks
- Customizable chord progressions, keys, and tempo
- Extensive song library
- Simple song editor
- Band and instrument customization
- Cross-platform syncing and offline mode
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Elevate your music practice with customizable backing tracks generated with audio from real instruments (guitar, mandolin, and standup bass). Strum Machine can play any chord progression, in any key, at any speed. It's the only backing-track app built specifically for players of bluegrass, old-time, fiddle tunes, and other such genres. (Although it works pretty good for some jazz/swing now, too!) Why musicians of all levels love Strum Machine: • Realistic Sound: Backing tracks are assembled in real time from studio-quality instrument recordings. • Quick Adjustments: Instantly adjust the speed/tempo, change the key, loop part of a song, etc. • Auto-Speedup: Gradually increase the BPM at the end of every repetition for training purposes. • Chord Reference: Clean, beautiful chord charts, which can be displayed in letters or numbers (i.e. "1-4-5"). • Extensive Library: Over 1,300 songs (mostly from bluegrass and old-time) ready to go, with thousands more posted on the community forum. • Simple Song Editor: Add your own songs (or edit existing ones) in minutes. Almost every chord you can play on a guitar is available for use. • Customize the Band: Choose from a variety of built-in band styles, then optionally customize each instrument individually – adjust the strumming pattern, add automatic bass runs, and more. • Organize & Share: Create song lists for practicing or even performing, and share them with your friends or on the community forum. • Cross-Platform: Sync your custom songs, lists, and preferences with any device you use Strum Machine on: phone, tablet, or computer. (It works offline, too!) • Responsive Support: If you run into any problems or have questions, write us an email or post a message on the forum and someone will get back to you within a few days! Strum Machine is under active development and we're always working on ways to make the app even more useful to our users... while keeping it uncluttered and intuitive first and foremost. Discover how Strum Machine can improve your music practice today! Download Strum Machine and play a handful of demo songs instantly, without signing up. For the full experience, including access to all built-in songs and the ability to create your own, start a free trial. Terms of Use: https://strummachine.com/terms Privacy Policy: https://strummachine.com/privacy
Screenshots
Verdict
The clearest difference is rating: Strum Machine at 4.7 against Endless A's 3.7. Strum Machine also leads on ratings volume (120 vs 3) and chart position (#165 vs unranked). Endless A's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 89%). On price, update cadence, 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
Both are free to download. Strum Machine sells 1 in-app purchase, starting at $4.99 per month. Endless A asks for nothing beyond the download.
Strum Machine holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: Strum Machine has 120 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 100% of Endless A's written reviews are positive against 89% of Strum Machine's, so the app with the better star average is not the one people write more warmly about.
Endless A ships an update every 8 days, Strum Machine fortnightly. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.
| Parameter | Endless A | Strum Machine |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.7 (120 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 88.7% of reviews |
| Number of ratings | 3 | 120 — better |
| Update frequency | Every 8 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | — | #165 — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.4 — better |
| Further details — not scored | ||
| Size | 6 MB | 77 MB |
| Age rating | 4+ | 4+ |
| Developer | Nathan Fennel | Luke Abbott LLC |
Customer experience
Endless A
Strum Machine
In-app purchases
Endless A
No in-app purchases
Strum Machine
- Monthly Subscription14 Days trial$4.991 Month









