Comparison

KANTAN Chord vs GORILLA DRUM

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

Head to head
About

KANTAN Chord

Features
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• Overview KANTAN Chord is a browser extension that converts various chord sites' song chords to its "degrees", also known as Nashville Numbers. (Former name: InstaChordizer) • Compatible sites - ULTIMATE GUITAR TABS(https://www.ultimate-guitar.com/) - U-フレット(https://www.ufret.jp/) - 楽器.me(https://gakufu.gakki.me/) - J-Total Music(https://music.j-total.net/) - Guitarians.com(https://guitarians.com/) - 91譜(https://www.91pu.com.tw/) • How to use Open the chord web page. From the browser extensions, choose KANTAN Chord icon and it opens a pop-up window. Choose from tabs "C,F,G" (original) , "I,IV,V" (roman numerals), or "1,4,5" (degrees). - "C,F,G" (original) Displays the chords in its original form. Select radio buttons change keys. - "I,IV,V" (roman numerals) Displays the chords' degrees, in standard roman numerals format. - "1,4,5" (degrees) Displays the chords' degrees, in numbers. Different symbols follow the "KANTAN Chord" system, based on the Nashville Number System. For more details, please visit this page: https://instachord.com/instruction/icn/ • Key analyzation KANTAN Chord automatically analyzes the song's key and displays it in red text with a yellow background banner. When the key changes during a song, it will be displayed with additional banners. E.g. "Key:E(-3)" or "Key:Ab(+1)" Numbers such as (-3) and (+1) represent half steps. If your instrument can transpose, try adjusting to these numbers. If the key analyzation is wrong or is difficult to play, try adjusting the analyzation sensitivity. - Ignore +-5 key changes When changing to a dominant (+5 half steps) or subdominant key (-5 half steps) , chords used will be very similar to its original key. When this option is turned on, KANTAN Chord will ignore +-5 key changes and stay in its original key. • Displayed keys You can choose keys outside of the auto-analyzed key. - Song's analyzed key The song's auto-analyzed most likely key is outlined in a box. - Difficulty rank The numbers in front of the key (Eg. ①, ②, ③...) are difficulty ranks when playing on the InstaChord, from easiest to most difficult. Please use as reference, when the analyzed key if wrong or when the original key is difficult to play. ① and ② are in bold, and ① is underlined. - Changing they key (in C,F,G tab) When in the C,F,G tab, you can pick different keys to transpose to. - Changing they key (in I,IV,V or 1,4,5 tab) In I,IV,V or 1,4,5 tab, you can change the base key. Apply when the analyzed key is wrong, or when the original key is difficult to play. If other keys are greyed-out, turn off analyzation sensitivity. • Options for C,F,G tab - Disable automatic loading KANTAN Chord will not take effect until the icon is pressed. Use this option if there are compatibility issues with the site's features or other extensions. This option is only effective in the C,F,G tab. - Hide key display KANTAN Chord displays the song's key and displays it in red text with a yellow background banner. Use this option to hide the key display. This option is only effective in the C,F,G tab. • Options for I,IV,V tab - b → # All half tones are represented with # - IIm, VIm → ii, vi Minor chords are represented with lower case roman numerals. • Options for 1,4,5 tab - 3b/7b → 8/9 (5b/2b → 8/9 for minor key) For the InstaChord, commonly used chords are allocated on the 8 and 9 buttons. Using this option will make use of these buttons. - Use minor key Allows the use of minor key • Beginner mode By selecting LV.0 / LV.1 / LV.2 shown on the first line, you can adjust the difficulty of the chords. In LV.0 / LV.1 mode, chords will be simplified. In LV.2 mode, all chords will be in their original form. This mode isl not available when minor key is selected.

About

GORILLA DRUM

Features
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【Practice】 ・Includes ready-to-play practice phrases such as 8-beat, 16-beat, and rudiments ・Easily adjust the tempo (BPM) and number of repetitions during practice ・Set the tempo (BPM) to gradually increase as you practice ・Choose which parts to hear, such as only the bass drum or snare, so you can focus on areas you want to improve 【Create】 ・Use the piano roll to enter individual drum sounds such as snare and bass drum ・Combine preset phrases to create your own original practice phrases 【Share】 ・Post the practice phrases you create ・GORILLAS members can preview phrases posted by other users and download their favorites for practice Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KANTAN Chord4 screens
GORILLA DRUM4 screens

Verdict

The call

The clearest difference is in-app purchases: KANTAN Chord at none against GORILLA DRUM's 3. KANTAN Chord also leads on device support (4 vs 2). GORILLA DRUM's advantage is update cadence (every 3 days vs every 2 months). On price, ads and iOS requirement 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. GORILLA DRUM sells 3 in-app purchases, starting at $0.99 per month. KANTAN Chord asks for nothing beyond the download.

UpkeepUpdate frequency

KANTAN Chord ships an update every 2 months, GORILLA DRUM every 3 days. The most recent releases landed on September 8, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 3 level
KANTAN Chord versus GORILLA DRUM: the parameters behind the verdict, then further details
ParameterKANTAN ChordGORILLA DRUM
PriceFreeFree
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size1 MB88 MB
Age rating4+4+
DeveloperInstaChord Corp.Bouzer LLC

In-app purchases

None

KANTAN Chord

No in-app purchases

3 purchases

GORILLA DRUM

Subscriptions2
  • GORILLAS Monthly Membership Plan$0.991 Month
  • GORILLAS Yearly Membership Plan$9.991 Year
One-time1
  • Remove Ads & Unlock Limits$9.99

Questions

Is KANTAN Chord free?
KANTAN Chord is free to download, with no in-app purchases.
Is GORILLA DRUM free?
GORILLA DRUM is free to download, with in-app purchases available.
Do KANTAN Chord or GORILLA DRUM have ads?
Neither KANTAN Chord nor GORILLA DRUM shows ads.
Which is updated more often, KANTAN Chord or GORILLA DRUM?
KANTAN Chord ships an update every 2 months, and GORILLA DRUM every 3 days. Most recently, KANTAN Chord was updated on September 8, 2026 and GORILLA DRUM on October 29, 2026.

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