メトロノーム Poly vs Jazz Time Trainer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
メトロノーム Poly
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【2つのリズムを同時演奏】ポリリズムに対応したメトロノーム 上下2分割画面の「ツインメトロノーム」。 2つのメトロノームが完全に独立して動くので、複雑なポリリズムや変拍子の練習がこれ1台で完結します。 リズムの異なるピアノの右手と左手の練習にも使えます。 タップテンポに対応しました。 利用規約: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Jazz Time Trainer
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Jazz Time Trainer is a focused metronome and inner-pulse trainer built for jazz musicians, drummers, students, and serious practice sessions. This is not a generic click app. JTT is designed around the way musicians actually train time: internal pulse, click independence, 2 & 4 practice, gap-click work, odd meters, grouping, swing ride practice, subdivisions, and clean visual feedback. Key features: - 20-400 BPM tempo range - Stable high-output click engine - All Beats, 2 & 4, 1 Only, 4 Only - Gap Click and Random Drop timing challenges - Common time signatures for jazz practice - Odd meter and grouping concepts for modern jazz training - Subdivision practice for 8ths, 16ths, and triplet feels - Customizable beat accents and mute states - Multiple click sound profiles, including voice count mode - Swing Ride practice with Center, Ahead, and Layback feel options - Memory slots for saving practice setups - Minimal dark interface designed for practice, not distraction - Media mix mode for practicing while playing along with other audio JTT is made for musicians who care about time feel, not just BPM. No ads.
Screenshots
Verdict
The clearest difference is ads: Jazz Time Trainer at none against メトロノーム Poly's shown. Jazz Time Trainer also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, 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.
メトロノーム Poly ships an update every 6 days, Jazz Time Trainer every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | メトロノーム Poly | Jazz Time Trainer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Nito Kiyoshi | Sangwoo Shin |
In-app purchases
メトロノーム Poly
No in-app purchases
Jazz Time Trainer
No in-app purchases
Questions
Is メトロノーム Poly free?
Is Jazz Time Trainer free?
Do メトロノーム Poly or Jazz Time Trainer have ads?
Which is updated more often, メトロノーム Poly or Jazz Time Trainer?
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