Comparison

Workout Tracker AI vs Delta

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

Head to head
About

Workout Tracker AI

Features
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AIFitLog is a workout and body composition tracker built for lifters serious about muscle gain and fat loss. Log sets, reps, RIR, weight, and body fat to track volume, strength, FFMI, and lean mass trends over time. Every day becomes a page in your Training Diary, and AI turns your data into daily analysis, weekly scoring, and a day-by-day plan for next week. Plus TDEE and macro targets, 1RM calculator, warmup suggestions, plate calculator, and rest timer — everything you need at the gym, in one app. Workout Logging Track every set: muscle group, exercise, weight, reps, and RIR. Add notes per set to capture what you felt in the moment. Monitor total volume and max weight trends to see which muscle groups and exercises are actually progressing. Training Diary One page per day with your workout, body composition, and reflection. See how each exercise compares with last time (volume and max weight) and when you hit a new best. Flip through past days or jump to any date from the calendar. Writing reflections — how the session felt, any pain or discomfort, and your thoughts — is free. Muscle Map & Exercise Library Muscle Balance shows which muscles you've trained and which ones you're missing, at a glance. Tap a muscle on the body map to find exercises that target it. Body Composition Tracking Log weight and body fat to automatically calculate lean mass, BMI, and FFMI. You can also connect AIFitLog with Apple Health to automatically import body weight and body fat percentage into your body composition logs. AIFitLog only reads body weight and body fat percentage from Apple Health and does not write data to Apple Health. You can disable the integration at any time in the app settings. See how your body is actually changing — not just the number on the scale. Set TDEE and macro targets to support your bulk, cut, or recomp. AI Analysis (Premium) Your workout logs, body composition, and condition data — analyzed together. ・Daily Training Analysis Write in your Training Diary and AI analyzes the day's log and your reflection. Get feedback on the muscles you trained and how to handle pain or fatigue (once a day). ・Weekly Report Your week scored across training, body composition, and condition. What went well, what needs work, and where to improve. ・Next Week's Plan A day-by-day workout plan built from your logs, goals, and condition — designed for muscle gain, fat loss, or wherever you're headed. Built-in Tools ・Warmup Calculator — suggested warmup sets based on exercise type and working weight ・Plate Calculator — select target weight and bar weight to see exactly which plates to load ・1RM Calculator — estimate your max from weight and reps, plus estimated reps at any target weight ・Rest Timer — keeps running even when you leave the screen ・Reminders — set custom days and times, with an option to notify only on days you haven't trained Built for lifters who: ・Want to track workouts consistently and see real progress ・Are bulking or cutting with body composition data ・Train with data, not guesswork ・Want to keep a training diary of their sessions and reflections ・Want personalized AI analysis without a personal trainer price tag Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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。

Screenshots

Workout Tracker AI4 screens
Delta4 screens

Verdict

The call

The clearest difference is ads: Workout Tracker AI at none against Delta's shown. 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Workout Tracker AI sells 2 in-app purchases, starting at $1.99 per month and Delta sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Workout Tracker AI ships an update every 2 weeks, Delta every 11 days. Both last shipped on November 5, 2026.

Scorecard1 real difference · 5 level
Workout Tracker AI versus Delta: the parameters behind the verdict, then further details
ParameterWorkout Tracker AIDelta
PriceFreeFree
Update frequencyEvery 2 weeksEvery 11 days — better
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size18 MB48 MB
Age rating4+4+
DeveloperYasutaka SuzukiB8T LABS

In-app purchases

2 purchases

Workout Tracker AI

Subscriptions2
  • Premium Monthly$1.991 Month
  • Premium Yearly$19.991 Year
1 purchases

Delta

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

Questions

Is Workout Tracker AI free?
Workout Tracker AI is free to download, with in-app purchases available.
Is Delta free?
Delta is free to download, with in-app purchases available.
Do Workout Tracker AI or Delta have ads?
Delta shows ads; Workout Tracker AI does not.
Which is updated more often, Workout Tracker AI or Delta?
Workout Tracker AI ships an update every 2 weeks, and Delta every 11 days. Most recently, Workout Tracker AI was updated on November 5, 2026 and Delta on November 5, 2026.

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