Comparison

Tritone Jazz vs 421Grid

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

Head to head
About

Tritone Jazz

This app provides piano, bass, and drum accompaniments for jazz improvisation practice. Users can input chords and even melodies or vocals, with the option to print charts including chords, notes, and lyrics. Song data is stored in a text format for easy sharing.

Highlights
  • Chord-based accompaniments
  • Piano, bass, and drum backing tracks
  • Melody and voice playback
  • Printable charts with chords, notes, and lyrics
  • Text-format song data for sharing
Read full description

Practicing jazz improvisation is not always easy. Tritone Jazz can give you piano, bass and drums accompaniments. All you need is to type in the chords. Melody is also played if included. Even voice, too. The song data is actually text-format so that you can send it by text message or e-mail. You can print the chart with chords, notes and lyrics. Please check the demo videos at http://youtube.com/channel/UCwptdeJOI1b2Qc3uajDiY2w

About

421Grid

Features
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Turn Practice into Progress. Inspiration into Execution. Whether you’re a drumline veteran, music educator, or aspiring percussionist, this app is your personal drumming lab—designed to help you experiment, customize, and level up your chops with precision. Built for Rudimental Drummers Who Want More Forget flipping through old notebooks or searching YouTube for exercises you can’t customize. With this app, you can build your own practice grids, apply the legendary 4-2-1 structure, and modify exercises using accents, subdivisions (triplets, fivelets, sixteenths), or even alternate stickings—all with just a few taps. Customize Everything Shift the beat. Change the direction. Reverse your sticking. Or layer complexity to push your brain and hands to the limit. Every exercise becomes your own. Designed for Students and Educators Music teachers: Quickly generate custom warmups or technique builders for your drumline. Students: Practice smarter, not just harder—with structured routines and unlimited variations. Why Drummers Are Calling This a Game-Changer: • Reinforces fundamentals through creative repetition • Encourages daily practice through customization and challenge • Perfect for drumline auditions, solo prep, or just sharpening your hands • No internet? No problem. Train anywhere you take your sticks. Ready to Break Through Your Plateaus? This isn’t just another drumming app. It’s your creative practice engine, your daily workout, and your edge over the competition. Download now and redefine your rudimental journey.

Screenshots

Tritone Jazz4 screens
421Grid4 screens

Verdict

The call

The clearest difference is price: 421Grid at $1.99 against Tritone Jazz's $6.99. Tritone Jazz's advantage is update cadence (every 6 weeks vs every 3 months) and iOS requirement (11.0 vs 18.0). On ads, in-app purchases 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

Tritone Jazz costs $6.99 and 421Grid $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Tritone Jazz ships an update every 6 weeks, 421Grid every 3 months. The most recent releases landed on July 5, 2026 and September 17, 2026 respectively.

Scorecard3 real differences · 6 level
Tritone Jazz versus 421Grid: the parameters behind the verdict, then further details
ParameterTritone Jazz421Grid
Price$6.99$1.99 — better
Rating1.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 6 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better18.0
Further details — not scored
Size107 MB4 MB
Age rating4+4+
DeveloperJazz Soft, Inc.N. Wheeler

In-app purchases

None

Tritone Jazz

No in-app purchases

None

421Grid

No in-app purchases

Questions

Is Tritone Jazz free?
Tritone Jazz costs $6.99, with no in-app purchases.
Is 421Grid free?
421Grid costs $1.99, with no in-app purchases.
Do Tritone Jazz or 421Grid have ads?
Neither Tritone Jazz nor 421Grid shows ads.
Which is updated more often, Tritone Jazz or 421Grid?
Tritone Jazz ships an update every 6 weeks, and 421Grid every 3 months. Most recently, Tritone Jazz was updated on July 5, 2026 and 421Grid on September 17, 2026.

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