Comparison

Epilog vs Hydrium

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

Head to head
About

Epilog

Track your weightlifting progress with detailed metrics like weight, reps, and tempo. Analyze your performance muscle by muscle and set up circuit training routines. Measure body composition and sync with Apple Health.

Highlights
  • Record sets, reps, tempo, and rest
  • Analyze progression by muscle group
  • Create and track circuit training
  • Estimate 1RM and track volume
  • Log body measurements and photos
  • Exercise library with animations
Features
Read full description

The workout tracker that shows you're making progress. Epilog logs every set in seconds (weight, reps, tempo, RPE) and turns your workouts into a clear read on your progress, exercise by exercise and muscle by muscle. LOG FAST, STAY IN THE ZONE • Check off a set and the rest timer starts on its own • Rest timer on the Dynamic Island and the Lock Screen • Supersets, drop sets, warm-up sets and sets to failure • Tempo, RPE and notes on every exercise • Reorder or swap exercises in one tap YOUR PROGRESS, MUSCLE BY MUSCLE • See how much work each muscle gets, week after week • A muscle map shows where you train hard and where you lag behind • Every exercise has its own curve: estimated 1RM, top set, volume, reps • Personal records detected automatically and kept with their date 300+ EXERCISES, EXPLAINED • Instructions and common mistakes for each movement • Filter by muscle and equipment • Can't find one? Create your own CIRCUITS AND ROUTINES • HIIT circuits on the clock, EMOM, AMRAP, or free rounds • Build your routines, sort them into folders, and start from ready-made programs TRACK MORE THAN THE BAR • Body weight, body fat and circumferences, charted over time • Progress photos, compared side by side (Pro) • Calculators built in: plates, 1RM, percentage of 1RM, RPE, warm-up sets • Streaks and achievements to keep you coming back MADE FOR IPHONE • Home Screen widgets • Apple Health sync • Kilograms or pounds • Available in 12 languages ON APPLE WATCH (FIRST RELEASE) • Follow your workout and log your sets from your wrist • Rest timer and live heart rate Epilog is free to use, with unlimited workout logging. Go Pro for your full history, every stat and widgets. Try Pro free for 14 days. Download Epilog and make every workout count. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Hydrium

Features
Read full description

Hydrium helps you drink enough water every day, without having to think about it. During setup, Hydrium calculates your daily goal from your weight, activity level and climate, with adjustments for pregnancy, breastfeeding, workouts and hot weather. SIMPLE TRACKING • Log a drink in one tap: glass, mug, flask, bottle or a free amount • 4 animated visuals to watch your progress: bottle, silhouette, plant, ring • Drink type (water, tea, coffee, juice, soda...) is factored into your real hydration SMART REMINDERS • Reminders at a regular interval or at fixed times • Adaptive reminders: Hydrium automatically spaces out the reminders left in your day based on the time and how much you still need to drink • Automatic snooze after a large drink, reminders pause once you reach your goal HISTORY AND MOTIVATION • 7-day, 30-day, 12-month and all-time history • Charts and a breakdown by beverage • 12 badges to unlock, day streaks APPLE WATCH AND HEALTH • Full companion app for Apple Watch, synced with your iPhone in real time • Watch face complication: progress ring and volume in ml (circular, corner, rectangular and inline) • Your drinks are written to the Health app automatically • Reads your weight and workouts to refine your goal AUTOMATIC ICLOUD BACKUP • Optional, turned on in Settings › Data: a daily copy of your data in your iCloud Drive (Hydrium folder in the Files app), the 7 latest are kept • Restore from iCloud in a few taps, after a reinstall or on a new iPhone • Your data stays in your own iCloud account: Hydrium has no server • Manual backup and restore (JSON file) are still available 14-DAY FREE TRIAL • Try every Hydrium Plus feature free for 14 days, no subscription • When the trial ends, the app returns to the free version: your data is kept, and the containers, beverages and styles created during the trial stay hidden until you buy Hydrium Plus HYDRIUM PLUS (one-time purchase, no subscription) • Unlimited history (30 days, 12 months, all-time) • Unlimited custom containers and beverages • All 4 visual styles • Smart and adaptive reminders • Themed sounds • CSV export Available in English, French, Italian and Spanish. Units: milliliters, liters or ounces. Hydrium offers a comfort estimate to help you stay hydrated day to day; it does not replace medical advice.

Screenshots

Epilog4 screens
Hydrium4 screens

Verdict

The call

The clearest difference is iOS requirement: Epilog at 15.1 against Hydrium's 17.0. On price, update cadence, ads and in-app purchases 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. Epilog sells 6 in-app purchases, starting at $4.99 per month and Hydrium sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Epilog ships an update every 6 days, Hydrium every 4 days. Both last shipped on October 31, 2026.

Scorecard1 real difference · 9 level
Epilog versus Hydrium: the parameters behind the verdict, then further details
ParameterEpilogHydrium
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews90.5% of reviews—
Number of ratings2 — better—
Update frequencyEvery 6 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS15.1 — better17.0
Further details — not scored
Size115 MB9 MB
Age rating4+4+
DeveloperFit MassChristophe Fromage

In-app purchases

6 purchases

Epilog

Subscriptions6
  • Epilog Pro (Mensuel)14 Days trial$4.991 Month
  • Epilog Pro (Monthly)7 Days trial$6.991 Month
  • Epilog Pro (Monthly)14 Days trial$6.991 Month
Show 3 more
  • Epilog Pro (Annual)14 Days trial$22.991 Year
  • Epilog Pro (Annual)7 Days trial$29.991 Year
  • Epilog Pro (Annual)14 Days trial$29.991 Year
2 purchases

Hydrium

One-time2
  • 14-day TrialFree
  • Hydrium Plus$2.99

Questions

Is Epilog free?
Epilog is free to download, with in-app purchases available.
Is Hydrium free?
Hydrium is free to download, with in-app purchases available.
Do Epilog or Hydrium have ads?
Neither Epilog nor Hydrium shows ads.
Which is updated more often, Epilog or Hydrium?
Epilog ships an update every 6 days, and Hydrium every 4 days. Most recently, Epilog was updated on October 31, 2026 and Hydrium on October 31, 2026.

Other comparisons