Comparison

ChordMaster AI vs SUS4 Capo Calc

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

Head to head
About

ChordMaster AI

Features
Read full description

Play a song, and ChordMaster AI tells you the chords. You also get the lyrics, the key, the tempo and a capo suggestion, so you can start playing along in minutes instead of working it out by ear for an hour. HOW IT WORKS 1. Record a song with your microphone, or upload an audio file from your phone 2. ChordMaster AI listens and finds the chords 3. Play it back and follow along. The current chord and lyric line light up as the song plays. WHAT YOU GET FREE - Chords, lyrics, key and tempo for any song - Capo suggestion - Transpose the chords to any key - Chords and lyrics that follow along during playback - Chord library with finger diagrams - 3 songs a day, recordings up to 2 minutes - Save up to 5 songs PRO - Slow any song down without changing the pitch - Loop the hard part until you've got it - Unlimited songs, no daily limit - Record up to 10 minutes - Print-ready chord and lyric sheets (PDF) - Waveform that follows the song as it plays - Unlimited saved songs The yearly plan starts with a 7-day free trial. GREAT FOR - Guitarists learning songs by ear - Pianists who want a quick chord chart - Worship leaders getting ready for Sunday - Songwriters studying how songs are built - Music teachers making lesson material SUBSCRIPTION INFO Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple ID account settings at any time. If you start a free trial, it becomes a paid subscription unless you cancel at least 24 hours before the trial ends. Any unused part of a free trial is forfeited when you buy a subscription. Privacy Policy: https://sketchmyapp.com/chordmasterai/privacy Terms of Use: https://sketchmyapp.com/chordmasterai/terms

About

SUS4 Capo Calc

Features
Read full description

Pick the key you want to sing in and see which fret the capo goes on and which shapes to play. It also works the other way: type the chords and it finds the key. Fully on-device: no cloud, no account. Choose your tuning, choose the target key, and Capo Calc lists the options with the fret and the shapes, with open-friendly shapes first if you want them. Change the tuning to drop D, DADGAD or open G and the answer changes with it. โ€ข Capo position and chord shapes for any target key โ€ข Find Key: type a progression and get its key โ€ข Standard, dropped, open and modal tunings, and 7 and 8-string guitars โ€ข Fretboard diagrams for each suggestion For singers moving songs into their range, worship guitarists following a key sheet, and guitarists playing with a second guitar. Everyone gets two calculations a day. Pro, or SUS4 All-Access across the whole range, removes the daily limit. Made in the UK by working musicians. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ChordMaster AI3 screens
SUS4 Capo Calc4 screens

Verdict

The call

ChordMaster AI and SUS4 Capo Calc are too close to call on the numbers: across 6 compared parameters โ€” price, update cadence, ads and in-app purchases among them โ€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. ChordMaster AI sells 2 in-app purchases, starting at $9.99 per month and SUS4 Capo Calc sells 11 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ChordMaster AI ships an update every 3 weeks, SUS4 Capo Calc every 2 weeks. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

ScorecardNo meaningful differences
ChordMaster AI versus SUS4 Capo Calc: the parameters behind the verdict, then further details
ParameterChordMaster AISUS4 Capo Calc
PriceFreeFree
Update frequencyEvery 3 weeksEvery 2 weeks โ€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, Mac, Apple Watch โ€” better
Requires iOS15.1 โ€” better16.0
Further details โ€” not scored
Size22 MB29 MB
Age rating4+4+
DeveloperJames PeltonThePaulSmith

In-app purchases

2 purchases

ChordMaster AI

Subscriptions2
  • Pro Monthly$9.991 Month
  • Pro Yearly7 Days trial$79.991 Year
11 purchases

SUS4 Capo Calc

Subscriptions8
  • SUS4 Capo Calc Pro Monthly7 Days trial$0.991 Month
  • SUS4 All-Access7 Days trial$4.391 Month
  • SUS4 All-Access7 Days trial$5.991 Month
Show 5 more
  • SUS4 All-Access7 Days trial$7.991 Month
  • SUS4 All-Access Annual7 Days trial$19.991 Year
  • SUS4 All-Access Annual7 Days trial$26.991 Year
  • SUS4 All-Access Annual7 Days trial$35.991 Year
  • SUS4 All-Access Annual7 Days trial$51.991 Year
One-time3
  • SUS4 Capo Calc Lifetime$54.99
  • SUS4 Capo Calc Lifetime$71.99
  • SUS4 Capo Calc Lifetime$103.99

Questions

Is ChordMaster AI free?
ChordMaster AI is free to download, with in-app purchases available.
Is SUS4 Capo Calc free?
SUS4 Capo Calc is free to download, with in-app purchases available.
Do ChordMaster AI or SUS4 Capo Calc have ads?
Neither ChordMaster AI nor SUS4 Capo Calc shows ads.
Which is updated more often, ChordMaster AI or SUS4 Capo Calc?
ChordMaster AI ships an update every 3 weeks, and SUS4 Capo Calc every 2 weeks. Most recently, ChordMaster AI was updated on October 28, 2026 and SUS4 Capo Calc on October 31, 2026.

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