Delta vs Power Memo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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。
Power Memo
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Power Memo is a workout log built the way lifters actually train — in cycles. Set your split up once: which muscle groups on which day, how long the cycle runs, how many times it repeats. From then on every training day is laid out ahead of you. Open the app at the gym and today's routine is already waiting. BUILD YOUR SPLIT • Assign muscle groups to each day and let the cycle rotate on its own • Three ways in: set a simple weekly frequency, design a day-by-day split, or count down to a contest date • 400 preset exercises to choose from, plus anything you name yourself • Link exercises into supersets and giant sets and log them as one block LOG EVERY SET • Weight and reps, set by set, with last session's numbers right in front of you • Drop sets, forced reps, assist machine and bodyweight-plus-load are all built in • A rest timer for each exercise that shows your own form cues while it counts down • Cardio logged in minutes and distance instead of weight WATCH IT CLIMB • Every exercise carries a rank, from Starter up to Champion, that rises with your numbers • Session-by-session bars for each lift: sets, top weight, total volume • Cycle progress at a glance — days elapsed, completion rate, personal records • A monthly calendar showing what you planned next to what you actually did MY REPORT Turn a session, a whole cycle, or a new personal record into a card you can save to Photos and post anywhere. NUTRITION AND BODY Log protein, fat, carbs, water and calories against daily targets, plus body weight and body fat. Add your own nutrients if the presets don't cover what you track. KG OR LBS, ENGLISH OR JAPANESE Switch units and language any time in Settings. Everything you have already logged carries over unchanged. ICLOUD BACKUP Sign in with Apple and your whole history backs up to your own private iCloud storage, ready to restore on a new device. SUBSCRIPTION Power Memo's features require a subscription. • Monthly — auto-renewing, billed every month • Annual — auto-renewing, billed every year • A 7-day free trial comes with your first subscription. Cancel during the trial and you are not charged. The price that applies in your region is shown in the app and on this product page before you confirm the purchase. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the current period ends. You can manage your subscription and turn off auto-renewal in Settings → Apple Account → Subscriptions after purchase. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use (EULA): https://fitnessisthebest.github.io/powermemo-legal/terms-en.html Privacy Policy: https://fitnessisthebest.github.io/powermemo-legal/privacy-en.html
Screenshots
Verdict
The clearest difference is ads: Power Memo at none against Delta's shown. Delta's advantage is update cadence (every 11 days vs every 6 weeks). On price, in-app purchases, device support 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
Both are free to download. Delta sells 1 one-off in-app purchase and Power Memo sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Delta ships an update every 11 days, Power Memo every 6 weeks. The most recent releases landed on November 5, 2026 and November 2, 2026 respectively.
| Parameter | Delta | Power Memo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 11 days — better | Every 6 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 48 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | B8T LABS | yuji shimokase |
In-app purchases
Delta
- Delta Pro (Remove Ads)$1.99
Power Memo
- Power Memo Monthly Plan7 Days trial$2.991 Month
- Power Memo Yearly Plan7 Days trial$26.991 Year





