Comparison

POWER vs 筋トレLog

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

Head to head
About

POWER

Transform your gym sessions into a rewarding experience. Log workouts, earn experience points, level up, and unlock achievements. Track your progress with detailed analytics and visual representations of your strength development.

Highlights
  • Log workouts in three taps
  • Gamified leveling system with EXP and titles
  • Detailed progress and growth analysis
  • Muscle map visualization
  • Personal record history
  • Shareable workout summaries
Features
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Turn "I trained today" into strength you can see. POWER is a training log where every set becomes progress. Log a set, earn EXP, level up, unlock titles. The longer you keep going, the more the numbers climb — so there's always a reason to go. ■ Logging takes three taps Body part → exercise → set. Your last session shows up first, so you can just repeat the same weight. ・Weight × reps, time and distance (bodyweight moves included) ・Tap ↩ to copy last time's weight, reps and notes ・Rest timer that runs in the background: 60 s / 90 s or any minute up to 10, with the time left on the Lock Screen ・Build routines and pull a whole workout in at once; one card shows your progress ■ The longer you train, the stronger you get (POWER mode) ・Levels and EXP from consistency, intensity and personal records (up to Lv.300) ・Around 390 titles and 30 level ranks, from Challenger up to Muscle God ・Your character grows with you: the Status avatar changes shape every 5 levels (20 stages, male and female) ・Cheers: see how many people are training right now and send each other a cheer ・Power Index — one score for everything you've built up ・Condition drops after two weeks off; Rest mode protects planned breaks. Streaks live as long as you train within 7 days, with shields for days you can't ・Three stages: clear LR, the top rank, and you move on — Lifter → King → God ■ See every bit of your progress ・Status: part levels on a radar chart plus seven gauges — weak spots at a glance ・Growth analysis: trend charts, growth-speed ranking and a per-part view ・Muscle map: the body highlights the parts you actually trained ・PR history: every personal record you've broken, in order ・POWER Rank: a nine-step staircase from D to LR, with the weight you still need shown as "a weight you can do 10 reps with" ・Calendar: training days coloured by body part, with meals, calories and EXP ・Monthly report: consistency, strength, PRs, volume, calories and balance graded S to D ■ Coach and meals (Premium) ・Coach: say how much time you have and how you feel, and today's menu is built for you. Feedback after each workout, a report every Monday, advice when you stall. Choose Takeru or Emma ・AI coach analysis: your plan to the goal, a forecast of when you'll reach a target at your current pace, training density and more. Things you tell your coach are remembered ・Meals: manual entry, AI chat, photo or My Recipes. Calories and macros, a daily target toward your goal weight, and "Let AI fill it" for numbers you don't know. Log past days too ■ Your body, in the same app ・Apple Health: reads the weight from your scale app, writes workouts, meals and weight to Health. Steps count toward calories burned ・Body tab: weight with body fat %, water, bowel movements, supplements and medication with reminders ・Home and Lock Screen widgets: level, streak, today's status, the last 7 days and more ■ Standards for men and women Titles, POWER Rank and calorie estimates use standards for your sex. ■ Share in one tap A share card lists every exercise, your PRs and calories burned, with a transparent version for social posts. ■ Also ・日本語 / English / 한국어 / 繁體中文, kg / lb ・8 accent colours, 4 text tones, dark mode. Simple mode if you just want the log ・Records stay on your device (no account). Export and import when you change phones ― About POWER plans ― Logging, levels, titles, status, growth, muscle map, calendar, cheers and share cards are free, forever. Paid plans add the coach, meals and more — see "POWER Plans" in the app. New users get 30 days of Premium free from install (no sign-up, no payment; it returns to the free plan automatically). Subscriptions are charged to your Apple ID and renew automatically unless cancelled at least 24 hours before the end of the period. Manage or cancel anytime in iOS Settings → Apple ID → Subscriptions. Terms of Use: https://power-privacy.netlify.app/terms.html Privacy Policy: https://power-privacy.netlify.app/privacy.html

About

筋トレLog

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ジムでの記録に手間をかけたくない人のための、シンプルで速い筋トレ記録アプリです。 ■ キーボードを出さずに記録する 重量も回数もドラムを回して選ぶだけ。数字キーボードが画面を覆うことがないので、セットの合間の数秒で入力が終わります。 重量の刻みは0.25kg単位まで設定できるので、マイクロプレートを使ったトレーニングにも対応します。前回そのメニューで挙げた重量と回数が入力欄のすぐ上に出るため、思い出す手間もありません。 ■ 画面を消していても鳴るインターバルタイマー セット間の休憩時間を計測し、終了時に通知でお知らせします。アプリを閉じていても、画面がロックされていても鳴ります。音楽やオーディオブックを再生している最中でも止まりません。 音・バイブレーション・通知は、それぞれ個別にオン/オフを切り替えられます。 ■ 伸びているかどうかが見える ・種目ごとの推定1RM(1回だけ挙げられる最大重量)の推移 ・部位別のトレーニングボリューム(重量×回数の合計)の推移 ・トレーニングした日が一目で分かるカレンダー カレンダーは胸・背中・脚など部位で絞り込めます。脚だけを表示すれば、脚を鍛えた日だけが色で並ぶので、部位の偏りにすぐ気づけます。 ■ RM計算機を内蔵 「80kgを8回挙げられるなら、1回なら何kgか」をその場で計算できます。次に狙う重量の見当をつけるときに使えます。 ■ 有酸素運動も同じアプリで 時間・距離・速度・傾斜・消費カロリー・心拍を記録できます。HIIT向けに、WORK(追い込み)とREST(休憩)のセットをまとめて作る機能もあります。 ■ ライトモードとダークモード 端末の設定に合わせた自動切り替えのほか、いつもライト・いつもダークに固定することもできます。 ■ アカウント登録なし・オフラインで動く ログインもユーザー登録も不要です。アプリを開いた瞬間から使えます。 記録はすべてお使いのiPhoneの中だけに保存され、開発者が見ることはできません。電波の届かない地下のジムでも、機内モードでも、記録・履歴・グラフ・タイマー・RM計算などの主要機能が動きます。お問い合わせ用のメールアプリや参考動画・App Storeの外部ページを開く場合は通信が必要です。 ■ 記録を失わないために iPhoneのバックアップに含まれるため、機種変更をしてもそのまま引き継げます。CSV形式での書き出しと読み込みにも対応しているので、パソコンの表計算ソフトで自分なりに集計することもできます。 ■ 記録できること ・部位:胸/背中/脚/肩/腕/腹/有酸素/その他 ・器具:バーベル/ダンベル/マシン/ケーブル/自重 ・種目は自由に追加・編集できます ・その日ごとのメモ ■ 広告なし・課金なし すべての機能を無料でお使いいただけます。アプリ内に広告は表示されません。

Screenshots

POWER4 screens
筋トレLog4 screens

Verdict

The call

The clearest difference is in-app purchases: 筋トレLog at none against POWER's 4. 筋トレLog also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.0). On price, update cadence 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

Both are free to download. POWER sells 4 in-app purchases, starting at $5.99 per month. 筋トレLog asks for nothing beyond the download.

UpkeepUpdate frequency

POWER ships an update every 5 days, 筋トレLog every 9 days. Both last shipped on October 31, 2026.

Scorecard3 real differences · 5 level
POWER versus 筋トレLog: the parameters behind the verdict, then further details
ParameterPOWER筋トレLog
PriceFreeFree
Positive reviews50.0% of reviews—
Update frequencyEvery 5 days — betterEvery 9 days
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size25 MB5 MB
Age rating4+4+
DeveloperYOTATIS MANGNIMITChihiro Homma

In-app purchases

4 purchases

POWER

Subscriptions4
  • プレミアム1 Month trial$5.991 Month
  • プロ$9.991 Month
  • プレミアム$49.991 Year
Show 1 more
  • プロ$69.991 Year
None

筋トレLog

No in-app purchases

Questions

Is POWER free?
POWER is free to download, with in-app purchases available.
Is 筋トレLog free?
筋トレLog is free to download, with no in-app purchases.
Do POWER or 筋トレLog have ads?
POWER shows ads; 筋トレLog does not.
Which is updated more often, POWER or 筋トレLog?
POWER ships an update every 5 days, and 筋トレLog every 9 days. Most recently, POWER was updated on October 31, 2026 and 筋トレLog on October 31, 2026.

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