M vs Delta
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
M
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[The Ultimate Workout Logger for Serious Trainees: M-Memo] Optimize your hard work to the absolute limit and unlock your true potential. M-Memo is a hardcore workout logger built specifically for powerlifters and bodybuilders who demand precision without the fluff. We’ve eliminated all unnecessary distractions to focus purely on what matters most: lightning-fast logging and powerful, data-driven analytics. Every second of your intra-workout interval is precious. M-Memo delivers a streamlined, friction-free UI designed to let you log your sets instantly, keeping your focus entirely on the next heavy set. Key Features: ・Minimalist Interface: Zero clutter. Go from app launch to active logging in just a few seamless taps. ・Smart Unit Conversion: Toggle between KG and LBS instantly with a single tap. Eliminate mental math and zeros out lost time, whether you're at a commercial gym, using imported machines, or lifting on diverse plate setups. ・Visual History Tracking: Review the legacy of your hard work at a glance with a clean calendar view and monthly headers. ・Custom Routine Builder: Program your personal training splits—such as Push/Pull/Legs, Upper/Lower, or Arnold Splits—with complete freedom. ・One-Tap Workout Start: Hit the gym floor and launch your pre-configured routine instantly to dive straight into your first working set. ・Flexible Real-Time Editing: Dynamically add or delete exercises, or adjust your target sets mid-workout based on gym crowding or daily performance. ・Estimated 1RM Progression: Automatically calculate your Estimated One-Rep Max (1RM) from your daily training data, mapping your strength gains on a clean, visual progress graph. Muscle Recovery Tracking: Smartly track the exact time elapsed since you last smashed a specific muscle group. Hit the perfect window of supercompensation and give your muscles the next stimulus at the optimal time.
Delta
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前回よりも強くなる。 ジムでこの意識を持てないと、今日のトレーニングはなんとなくで終わってしまいます。 Deltaは、同じ種目の「前回」と「今日」を比べることをコンセプトにした筋トレ記録アプリです。 できること: ・前回の重量と回数を自動で引き継ぎ。入力は数字を少し直すだけ ・次に挙げる重量を提案 ・毎回の種目が決まっている人向けのテンプレート機能 ・推定1RM(今の実力で1回挙げられる重さの目安)の推移をグラフで表示 ・週ごとの総ボリュームと、部位ごとの偏りをチェック ・自己ベスト更新をトロフィーで表示 ・RPE / RIR は、使う人だけ記録可能 ジムで使いやすいように、数字は大きく、ボタンは片手で押しやすい位置に配置。 画面はシンプルで、余計な飾りはありません。 記録は端末内に保存されます。アカウント登録は不要です。 広告は買い切り(¥400)で非表示にできます。サブスクではありません。 日本語と英語に対応しています。 昨日の自分との差分を、今日の力に。 Deltaは、前回より強くなるための記録アプリです。
Screenshots
Verdict
The clearest difference is ads: M at none against Delta's shown. M also leads on update cadence (every 4 days vs every 11 days) and iOS requirement (13.0 vs 15.1). On price, 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. M sells 1 one-off in-app purchase and Delta sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
M ships an update every 4 days, Delta every 11 days. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.
| Parameter | M | Delta |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days — better | Every 11 days |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 54 MB | 48 MB |
| Age rating | 4+ | 4+ |
| Developer | Kawasaki Takato | B8T LABS |
In-app purchases
M
- テンプレートを無制限に解放$1.99
Delta
- Delta Pro (Remove Ads)$1.99








