HYDROX vs Rep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HYDROX
This app calculates your personalized daily hydration target based on body weight and training intensity, using scientific protocols. It offers one-tap logging, smart reminders, and advanced features for athletes and fitness enthusiasts. Syncs with HealthKit and offers an Apple Watch app.
- Personalized hydration targets
- Training intensity adjustment
- One-tap logging
- Smart reminders
- HealthKit sync
- Apple Watch app
- Widgets for home and lock screen
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Your hydration target, calculated. Not guessed. HYDROX uses your body weight and training intensity to set a daily target based on the same protocols used in elite athletic programs (combining guidance from the American College of Sports Medicine and published research from leading sports science researchers) Built for athletes who train: Barry's, HYROX, runners, cyclists, surfers, skiers, sports enthusiasts and everyday athletes. Not step-counter civilians SET YOUR BASELINE Your target comes from your body weight using the American College of Sports Medicine (ACSM) protocol, not a generic "8 glasses a day" number TRAINING MODE Select Easy, Moderate, or Hard and your daily goal adjusts using the Galpin equation based on body weight and workout intensity ONE-TAP LOGGING Tap the gauge to log, long-press for custom amounts, or log from your widget or lock screen without opening the app SMART REMINDERS Hourly pacing that adjusts to your progress, backs off when you're ahead, and nudges when you're behind HYDROX PRO • Apple Watch app with gauge and complications on any watch face • Log from your wrist in a single tap • Adaptive Hydration that reads workout data from HealthKit and adjusts your daily target automatically • Auto-intensity based on heart rate, so a hard session pushes your target up and a rest day keeps it at baseline THE SCIENCE Baseline from ACSM guidelines. Training intensity from the Galpin equation. Race Packs cite 16+ studies on sodium loading, HRV monitoring, and post-exercise rehydration. WHOOP research links hydration to higher HRV. And coffee counts as hydration (Killer et al 2014). EVERYTHING ELSE • HealthKit sync • Lock screen and home screen widgets • Quick actions from home screen • No account, no ads, data stays on your device Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://hydrox.app/privacy.html
Rep
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Log your lifts in 2 taps. Free of social-feed bloat. Rep is a privacy-first workout logger built for serious lifters who left Strong's subscription and Hevy's social feed behind. WHY REP - Log a set in 2 taps: weight (last-set default) + reps. - 100+ pre-seeded lifts + add custom. - Routines for guided workouts. Rest timer with haptic feedback. - Stats: per-lift trend, 1RM estimate, volume per muscle group. - 100% on-device via SwiftData. REP PRO - Rep Pro is an auto-renewable subscription (monthly or yearly) that unlocks unlimited routines, the plate calculator, and CSV export. - Free tier: unlimited workouts + 3 routines + full stats. - Payment is charged to your Apple Account at confirmation of purchase and renews automatically unless turned off at least 24 hours before the end of the period. Manage or cancel in your Apple Account settings. ABOUT Rep is built for lifters who want to log fast and analyze later. Apple Watch ergonomics in v1.1. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://rep.uptrail.ai/privacy
Screenshots
Verdict
HYDROX and Rep are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. HYDROX sells 4 in-app purchases, starting at $0.99 per 7 days and Rep sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | HYDROX | Rep |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 8 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | BALL VENTURES LLC | Mitaanshu Agarwal |
In-app purchases
HYDROX
- HYDROX Pro7 Days trial$0.997 Days
- HYDROX Pro7 Days trial$24.991 Year
- HYROX Americas DC Race Pack$14.99
- HYROX Miami Race Pack$14.99
Rep
- Rep - Workout Logger Pro Monthly7 Days trial$2.991 Month
- Rep - Workout Logger Pro Yearly7 Days trial$19.991 Year









