One Rep Max vs Kagiru
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One Rep Max
Safely estimate your maximum lift potential for various strength exercises using scientific formulas. Track your progress visually, set goals, and fine-tune estimates with perceived exertion. Ideal for powerlifters, CrossFit athletes, and strength enthusiasts.
- Precise 1RM calculations with 7 scientific formulas
- RPE integration for fine-tuned estimates
- Custom exercise tracking for any lift
- Visual progress graphs
- Percentage charts for training
- Goal setting and progress monitoring
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Stronger Training, Smarter Progress One Rep Max helps you safely and accurately determine your maximum lift potential for bench press, deadlift, squat, and any other strength exercise - without risking injury. Key Features: • Precise Calculations - 7 scientific formulas for accurate strength predictions: Epley, Brzycki, Lombardi, Mayhew, McGlothin, O'Conner, Wathan • RPE Integration - Factor in Rate of Perceived Exertion to fine-tune your max estimates based on how difficult sets feel • Custom Exercise Tracking - Create and monitor any lift that matters to you • Visual Progress - Beautiful graphs show your strength journey over time • Percentage Charts - Quick reference guide for training percentages • Goal Setting - Set targets and track your path to reaching them Perfect for: • Powerlifters optimizing their training cycles • CrossFit athletes tracking multiple movement patterns • Olympic weightlifters monitoring progress • Strength enthusiasts at any level Advanced Features: • Choose between multiple calculation formulas for different lift types • Track unlimited exercises with custom notes • Rate of Perceived Exertion (RPE) - Fine-tune your 1RM estimates based on how difficult sets feel • Analyze detailed statistics including volume and frequency • Set and monitor progress toward specific strength goals The Science Behind The Numbers: Our app employs multiple validated formulas to estimate your one-rep maximum based on your performance with submaximal weights. This provides you with safe strength targets before attempting potentially risky maximal lifts. Safety Note: Heavy weightlifting should always be performed with proper technique and appropriate spotting. This app provides estimates based on scientific formulas, but individual performance may vary based on experience level and training history. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Kagiru
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Kagiru is your strength-training companion. Log every set, rep, and weight, track your progress, and turn each session into real motivation. Build your own routines, train at your own pace, and let Kagiru keep score for you. Every workout earns XP, raises your level, protects your streak, and unlocks badges. Seeing your progress has never felt this good. FEATURES - Log sets, reps, and weights quickly and easily - Create and organize your own workout routines - Personal records (PRs) detected automatically - XP, levels, streaks, and badges to keep you hooked - Progress charts to visualize your evolution - Rest timer between sets - Reminders so you never lose your streak - Widgets and Live Activity to follow your session from the Home Screen - Optional Apple Health sync - Available in English and Spanish PRIVACY FIRST Your workout data is stored entirely on your device. No accounts, no servers. Your progress is yours. Start today, lift more, and push your limits with Kagiru.
Screenshots
Verdict
The clearest difference is in-app purchases: Kagiru at none against One Rep Max's 3. One Rep Max's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 26.1). On price, update cadence and ads 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. One Rep Max sells 3 in-app purchases, starting at $2.99 per month. Kagiru asks for nothing beyond the download.
One Rep Max ships an update every 6 days, Kagiru every 5 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.
| Parameter | One Rep Max | Kagiru |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (185 ratings) — better | — |
| Positive reviews | 58.2% of reviews | — |
| Number of ratings | 185 — better | — |
| Update frequency | Every 6 days | Every 5 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 26.1 |
| Further details — not scored | ||
| Size | 52 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Charles Vanderhoff | HORACIO GARZA |
Bugs and requests
One Rep Max
Reported bugs
13 issues- Features behind paywall
- Forced ads
- Deleted lifting history
- Lost all logs with update
- Weight limit restriction
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- Reloads excessively
- Wonky and now dead
- Complicated and too much offered
- Not intuitive for tracking
- Buggy about dates and lifts
- Cannot select other lifts
- Only logs back squats
- App copying content from clipboard
Requested features
7 requests- Allow editing of logs (date/time)
- Manual entry for weight preferred over slider
- Include different 1RM formulas (Epley, Brzycki)
- Ability to create custom graphs
- Fix weight limit restriction
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- Allow logging of more than 1073 pounds
- Update app
Kagiru
Not enough reviews yet to summarise bugs or requests.
In-app purchases
One Rep Max
- 1RM Pro Monthly$2.991 Month
- 1RM Pro Annual7 Days trial$19.991 Year
- 1RM Pro Lifetime$49.99
Kagiru
No in-app purchases








