Comparison

Delta vs BlankFit

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

Head to head
About

Delta

Features
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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。

About

BlankFit

Features
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Your workouts, more fun. BlankFit is a workout tracker that lets you log every set in a few taps, style the app your way, and rank up just by training. Turn your workouts into a habit you actually want to keep. LOG EVERY SET IN SECONDS • Pick an exercise and tap in weight and reps on a big, easy number pad • New sets start with your previous numbers, so you only fix what changed • Swipe right to duplicate a set, swipe left to delete. Drop sets supported • Browse exercises by muscle group and add them with one tap, or create your own • Rest timer with your own sound or vibration, plus notes for every exercise CELEBRATE EVERY PR • Hit a new personal best and BlankFit celebrates it on the spot • Track your total volume over time with charts • See each week at a glance and set a weekly goal MAKE THE LOOK ALL YOUR OWN • Pick a theme and the whole app changes • Fine-tune main, background and card colors • Use any photo as your app background • Add stickers, your own fonts, and colors and icons for each muscle group • Adjust card transparency while previewing your home screen EVERY REP RANKS YOU UP • Earn RP just by working out and climb 7 ranks, from Bronze to Champion • Battle friends every day (2–5 players). That day's training decides the ranking • Reach Diamond or higher to unlock legendary trophies and banners that make your friend card stand out TRAIN WITH FRIENDS • Add friends with a friend code or invite link • See what your friends trained today and cheer them on with stamps BLANKFIT PRO (SUBSCRIPTION) • 1RM chart and numbers to see your progress in detail • Automatic daily backup of your records (saved to our server, so you can restore on a new phone even without iCloud space) • Save as many custom looks as you like • Show friends your background photo, PRO badge and PRO banner • Unlimited custom exercises and your full note history Logging your workouts is free. No ads. Available in English and Japanese. Friends and Ranked features require Sign in with Apple. ABOUT SUBSCRIPTIONS BlankFit Pro is an auto-renewing subscription. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel it in Settings > [your name] > Subscriptions. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://docs.google.com/document/d/1RIeXze0iwJXrAgyh9CdUXmdZa8NL9QKQ9eMz-l_IVSg/edit?usp=sharing

Screenshots

Delta4 screens
BlankFit4 screens

Verdict

The call

The clearest difference is ads: BlankFit at none against Delta's shown. BlankFit also leads on update cadence (every 4 days vs every 11 days). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Delta sells 1 one-off in-app purchase and BlankFit sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Delta ships an update every 11 days, BlankFit every 4 days. Both last shipped on October 24, 2026.

Scorecard2 real differences · 4 level
Delta versus BlankFit: the parameters behind the verdict, then further details
ParameterDeltaBlankFit
PriceFreeFree
Update frequencyEvery 11 daysEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better16.4
Further details — not scored
Size48 MB79 MB
Age rating4+4+
DeveloperB8T LABSERIA, K.K.

In-app purchases

1 purchases

Delta

One-time1
  • Delta Pro (Remove Ads)$1.99
2 purchases

BlankFit

Subscriptions2
  • BlankFit Pro Monthly7 Days trial$2.991 Month
  • BlankFit Pro Yearly$22.991 Year

Questions

Is Delta free?
Delta is free to download, with in-app purchases available.
Is BlankFit free?
BlankFit is free to download, with in-app purchases available.
Do Delta or BlankFit have ads?
Delta shows ads; BlankFit does not.
Which is updated more often, Delta or BlankFit?
Delta ships an update every 11 days, and BlankFit every 4 days. Most recently, Delta was updated on October 24, 2026 and BlankFit on October 24, 2026.

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