1RM Max Calculator vs SBD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
1RM Max Calculator
Instantly calculate your one-rep max (1RM) for bench press, squat, and deadlift using 7 scientific formulas. Track your progress with intuitive charts and calendar records. Ideal for athletes and lifters aiming for more scientific and effective training.
- 7 scientific 1RM calculation formulas
- Supports bench press, squat, and deadlift
- Progress tracking and data visualization
- Calendar for daily record management
- One-tap data saving
- Offline functionality
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Accurate 1RM calculation using 7 scientific formulas Calculate your maximum weight for bench press, squat, and deadlift instantly! Using the average of 7 different proven formulas (Epley, Brzycki, Lander, and more) trusted by professional athletes to determine the most reliable 1RM. [Why choose this app?] - High-precision 1RM calculation using multiple formulas - Simple and intuitive interface - Comprehensive progress tracking - Data visualization for growth monitoring [Key Features] - Support for 3 major lifts (bench press, squat, deadlift) - 7 scientific calculation formulas for precise results - Calendar function for daily record management - Graph display for progress visualization - One-tap data saving - Full offline functionality [Perfect for] - Athletes wanting to track training effectiveness - Lifters needing accurate 1RM calculations - Anyone planning structured training programs - Fitness enthusiasts tracking their progress Make your training more scientific and effective. Take your lifting to the next level! Trusted by over 7,000 users worldwide.
SBD
This app focuses on tracking your progress for the three main powerlifting exercises: squat, bench press, and deadlift. It automatically calculates estimated 1RM, hypertrophy range, and volume, and logs personal bests. You can also record daily conditions, trained muscles, and notes for supplementary workouts.
- Track squat, bench press, and deadlift
- Automatic estimated 1RM calculation
- Automatic personal best logging
- Record daily condition and notes
- View progress with calendar and graphs
- Focus on BIG3 exercises
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BIG3に集中したい人のための、シンプルな記録アプリです。 スクワット、ベンチプレス、デッドリフト。 この3種目を軸に、無駄なく記録できます。 セットごとの重量と回数をすばやく入力でき、 推定1RM・筋肥大レンジ・ボリュームも自動で算出。 1repで過去最高を超えると、MAXとして自動登録されます。 その日のコンディションや鍛えた部位、メモも残せるので、 BIG3以外の補助トレーニングをした日もジム日として記録できます。 成長はカレンダーとグラフで振り返れます。 総合的なトレーニング管理アプリではありません。 あれこれ機能を詰め込まず、BIG3を中心にした記録に集中できる環境を目指しました。 BIG3を本気で伸ばしたい方に使ってもらえたら嬉しいです。
Screenshots
Verdict
The clearest difference is rating: SBD at 5.0 against 1RM Max Calculator's 4.2. SBD also leads on in-app purchases (none vs 3) and update cadence (every 2 days vs every 6 weeks). 1RM Max Calculator's advantage is ratings volume (22 vs 1). On price, ads, 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. 1RM Max Calculator sells 3 one-off in-app purchases. SBD asks for nothing beyond the download.
SBD holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: 1RM Max Calculator has 22 ratings behind it against 1, so its average is the more settled of the two.
1RM Max Calculator ships an update every 6 weeks, SBD every 2 days. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | 1RM Max Calculator | SBD |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (22 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 70.4% of reviews | — |
| Number of ratings | 22 — better | 1 |
| Update frequency | Every 6 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Kazumasa Shimomura | Fuchigami Sohta |
In-app purchases
1RM Max Calculator
- Calculator for deadlift$2.99
- Calculator for squat$2.99
- Ad Blocker$2.99
SBD
No in-app purchases
