Kepler Round Beat Box 2 vs Cymbal Builder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kepler Round Beat Box 2
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Kepler Round Beat Box is a music beat box. MAIN PANEL - Dragging the edge of round black plate can change volume. - Dragging a center ball makes sway the rhythm. - To stop sway mode touch and release at the same position on the round plate. - On metronome mode shows ringing pattern buttons. SETTING PANEL - Swing Setting -- No Swing -- Triplet Swing -- Golden selection Swing - Sound Selection -- Rock (default 16 beats) -- Samba (sample samba beats) -- Latin (sample latin beats) -- Broken beat (sample broken beat) -- Metronome
Cymbal Builder
Calculate cymbal weight ranges and visualize bow animations. This tool provides sonic guidelines based on weight, bow depth, and bell size, helping musicians understand cymbal design.
- Cymbal weight categorization
- Sonic guideline based on design
- Bow animation slider
- Analysis of weight, bow depth, and bell size
- Quantifiable design factors
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The Cymbal Builder is a Cymbal Weight Calculator and Cymbal Bow Animation Slider that allows you to categorize a cymbal's weight range by its given weight in grams and provide a sonic guideline based on a cymbal's depth of bow and bell size. While there are many factors that effect a cymbal's overall sound such as hammering, lathing, and other manufacturing factors; weight, bow, and bell size are readily quantifiable factors in the design of a cymbal.
Screenshots
Verdict
The clearest difference is update cadence: Kepler Round Beat Box 2 at every 19 months against Cymbal Builder's every 42 months. Kepler Round Beat Box 2 also leads on iOS requirement (12.0 vs 15.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Kepler Round Beat Box 2 ships an update every 19 months, Cymbal Builder every 42 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.
| Parameter | Kepler Round Beat Box 2 | Cymbal Builder |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (17 ratings) — better |
| Number of ratings | — | 17 — better |
| Update frequency | Every 19 months — better | Every 42 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 6 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Tomohisa Himeno | Byrne Cymbals |
In-app purchases
Kepler Round Beat Box 2
No in-app purchases
Cymbal Builder
No in-app purchases
Questions
Is Kepler Round Beat Box 2 free?
Is Cymbal Builder free?
Do Kepler Round Beat Box 2 or Cymbal Builder have ads?
Which is updated more often, Kepler Round Beat Box 2 or Cymbal Builder?
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