Comparison

Diatonic Chords by Key vs Só Cifra

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

Head to head
About

Diatonic Chords by Key

Features
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Key Chords turns music theory into chord shapes you can use. Explore the seven diatonic chords in major and natural minor keys, compare positions for guitar, ukulele, and Brazilian viola caipira, and keep a practical reference close while you practice or write. Explore chords by key • Choose a major or minor key and see its seven scale degrees with the matching chords. • Switch instruments to view the available shapes for guitar, ukulele, or viola caipira. • Save chord diagrams and diatonic chord sets as favorites on your device. • For guitar and viola caipira, choose to show an easier no-barre shape first when one is available. Find the shape you need Search the chord dictionary by symbol, instrument, or chord quality. Open a chord to compare the available fingering variations and use the clear diagrams as a quick reference during study or practice. Practice chord progressions Explore five familiar patterns, including I–V–vi–IV, ii–V–I, and I–IV–V, in different keys. Use them to practice changes, understand harmonic movement, or try ideas for your own music. Whether you are learning music theory, practicing chord shapes, or sketching a progression, Key Chords helps connect keys, degrees, and playable chords in one focused study tool.

About

Só Cifra

Features
Read full description

Take your rehearsals and performances to the next level with Só Cifra. Só Cifra is the ultimate app for musicians, bands, worship teams, and solo artists who want to organize their repertoires with practicality and professionalism. Replace folders full of paper and lost links with a system where all your songs, chords, and setlists are right in the palm of your hand. MAIN FEATURES: Smart Chords, Nashville Numbers, and Perfect Transposition Our advanced chord reader recognizes even the most complex chords, including slash chords, tensions, and extensions. Change the key of a song with a single tap to match any singer or instrument, or switch to degree notation/Nashville Numbers to play by harmonic function instead of fixed chord names. Fast Import Import songs and chord sheets from online sources in seconds. Add artists, edit lyrics, and customize your repertoire according to your needs. Band and Setlist Management Create projects for different bands, organize each band's repertoire, and build structured setlists for shows, rehearsals, or services. Keep your entire team aligned and always on the same page. Live Session Mode During a performance, focus is essential. The full-screen session mode offers optimized scrolling, a distraction-free interface, and quick navigation between songs in your setlist. Translation and Accessibility Carefully designed interface for a premium experience, available in Portuguese and English. The app features a clean visual design and full support for both dark and light modes. Who is Só Cifra for? Independent and professional bands Worship teams and churches Event musicians and acoustic performers Music teachers and students Download Só Cifra today, create your first setlist, and step on stage with confidence.

Screenshots

Diatonic Chords by Key4 screens
Só Cifra4 screens

Verdict

The call

The clearest difference is in-app purchases: Só Cifra at none against Diatonic Chords by Key's 1. Diatonic Chords by Key's advantage is update cadence (every 5 days vs fortnightly) and iOS requirement (13.6 vs 16.6). On price, 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

Both are free to download. Diatonic Chords by Key sells 1 one-off in-app purchase. Só Cifra asks for nothing beyond the download.

UpkeepUpdate frequency

Diatonic Chords by Key ships an update every 5 days, Só Cifra fortnightly. The most recent releases landed on October 25, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 3 level
Diatonic Chords by Key versus Só Cifra: the parameters behind the verdict, then further details
ParameterDiatonic Chords by KeySó Cifra
PriceFreeFree
Update frequencyEvery 5 days — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.6 — better16.6
Further details — not scored
Size36 MB2 MB
Age rating4+9+
DeveloperMateus Polonini CardosoAdriano Krauthein

In-app purchases

1 purchases

Diatonic Chords by Key

One-time1
  • Campo Harmônico Pro$2.99
None

Só Cifra

No in-app purchases

Questions

Is Diatonic Chords by Key free?
Diatonic Chords by Key is free to download, with in-app purchases available.
Is Só Cifra free?
Só Cifra is free to download, with no in-app purchases.
Do Diatonic Chords by Key or Só Cifra have ads?
Neither Diatonic Chords by Key nor Só Cifra shows ads.
Which is updated more often, Diatonic Chords by Key or Só Cifra?
Diatonic Chords by Key ships an update every 5 days, and Só Cifra fortnightly. Most recently, Diatonic Chords by Key was updated on October 25, 2026 and Só Cifra on November 5, 2026.

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