Doctrinal Mastery vs Piano Guide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Doctrinal Mastery
This app aids members of The Church of Jesus Christ of Latter-day Saints in memorizing and learning key scripture passages and articles of faith. It offers interactive learning activities like flashcards and quizzes to deepen understanding and recall.
- Study doctrinal mastery passages
- Learn Articles of Faith
- Memorization activities
- Flashcard review
- Quiz feature
- Import content from Gospel Library
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The Doctrinal Mastery app helps members of The Church of Jesus Christ of Latter-day Saints study and learn the 100 seminary doctrinal mastery passages, the Articles of Faith, and other content imported using the sharing feature within the Gospel Library app. The learning activities include memorizing, reviewing flashcards, and taking a quiz. Memorizing scriptures can provide a powerful source of inspiration in times of need.
Piano Guide
This app guides you to play piano by illuminating the keys on a connected LED strip. Choose songs, practice sections, and personalize your learning pace. It offers a private, ad-free experience for individual users.
- Connects to LED strip for key guidance
- Select and download songs
- Loop song sections for practice
- Personalized tempo and speed-up
- Individual song libraries per user
- No account or data tracking
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A little light. A beautiful song. Piano Guide connects to the Piano Guide LED strip — a light bar that sits above your piano keys and shows you exactly which keys to press. Pick a song in the app, and follow the light. FEATURES - Durable LED strip hangs lightly above your keyboard — never interfering with your playing - Plug into any USB power and the strip is instantly ready to connect to the app - Enter your Wi-Fi once, then download your favorite songs straight from piano-guide.app - Onboard memory holds over 5,000 songs - Loop any section of a song and repeat it until you master it — section by section - Personalized practice: choose your starting and ending tempo for each session - Gradual speed-up at your own pace — slowly and surely building real skill and muscle memory - Every family member gets their own song library, playlists, and personal settings YOUR PRIVACY No account, no email, no tracking. Your songs, playlists and settings are stored directly on your own strip. We have zero access to your data. Piano Guide requires the Piano Guide LED strip hardware. See it in action: piano-guide.app/demo Free songs at piano-guide.app
Screenshots
Verdict
The clearest difference is rating: Piano Guide at 5.0 against Doctrinal Mastery's 4.3. Piano Guide also leads on update cadence (monthly vs every 8 months) and iOS requirement (15.0 vs 17.6). Doctrinal Mastery's advantage is ratings volume (235 vs 1). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Piano Guide holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Doctrinal Mastery has 235 ratings behind it against 1, so its average is the more settled of the two.
Doctrinal Mastery ships an update every 8 months, Piano Guide monthly. The most recent releases landed on October 29, 2026 and October 19, 2026 respectively.
| Parameter | Doctrinal Mastery | Piano Guide |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (235 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 77.1% of reviews | — |
| Number of ratings | 235 — better | 1 |
| Update frequency | Every 8 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 40 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | The Church of Jesus Christ of Latter-day Saints | Parviz Shahriari |
Customer experience
Doctrinal Mastery
Piano Guide
Bugs and requests
Doctrinal Mastery
Reported bugs
4 issues- Blank Articles of Faith questions
- Score always shows as '0' in quizzes
- Formatting issues with scripture display
- Incompatibility with newer iOS versions
Requested features
5 requests- Add ability to delete/edit added scriptures
- Implement random order for quizzes and flashcards
- Include audio for scripture verses
- Add support for syncing across devices
- Provide option to select specific scripture sets to study
Piano Guide
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Doctrinal Mastery
No in-app purchases
Piano Guide
No in-app purchases
