Comparison

EpiDiary vs HydroFlow Ocean

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

Head to head
About

EpiDiary

This app helps individuals with epilepsy track seizures, medications, and symptoms. It features visual medication management and allows for detailed recording of moods, triggers, and side effects. Data syncs to a web platform for personalized reports to share with healthcare providers.

Highlights
  • Record and monitor seizures
  • Track epilepsy medications
  • Record triggers and side effects
  • Visual medication management
  • Generate personalized reports
  • Sync data to web platform
Features
Read full description

Important note: This app is by invitation only. Please do not use this app unless you already have a username and a password for this app. Do you or a loved one have epilepsy? If you do, most likely you have been asked to keep track of seizures, medicines, and how you feel. EpiDiary can easily keep track of epilepsy symptoms and also helps in epilepsy awareness. This application can help you track and monitor epilepsy quickly and more easily than keeping paper diaries. EpiDiary has Visual Medication Management (VMM) technology to improve your safety in taking medications. In a world where epilepsy medications from different sources are provided to patients, the color, size and shape of the pills changes frequently. Having large, actual photos of your own medications on your phone provides new and better capabilities that can help you. EpiDiary can do seizure monitor to an extent this way. EpiDiary lets you use the new technology to manage your epilepsy as you use to simplify the rest of your everyday life! It lets you record real-time details about seizures and monitoring seizure time, medications, side effects, moods, triggers, and you can even include detailed notes - all from your iPhone. You can easily keep track of epilepsy symptoms and be ready in case you notice chances of epileptic seizure. With EpiDiary you can track your sleep, which might be associated with seizures and effectively do seizure monitor. Epilepsy awareness is still very low in people and having Epidiary at your aid will definitely make a difference. When your entry is completed, it is synched to your diary on EpiDiary.com where you can generate personalized reports to bring to medical visits, providing your doctors and nurses with not only snapshots of recent events, but also long-term trend data, both key to assessing treatment effectiveness. You can monitor seizures effectively. By reviewing graphs and other reports, you can visualize trends that can help you and your healthcare professionals improve your treatment. FEATURES * Record and Monitor Seizures (single or clusters) * Monitor and Record Epilepsy Medications/Medicines, when to take them and when to refill them * Record Triggers (10 standard or customize your personal trigger) * Record Side Effects including the severity of the reaction. * Get reminders for your epilepsy medications and refills ADDITIONAL FEATURES that are available when you access your diary on https://EpiDiary.com including: - Personal Medical History Record to Detect and Predict Early Epilepsy Warning - Customized Reports – including graphs which can be printed or emailed - Setup Reminders for medication, refills, or other personal events via text message or email - Uploading photos or files to attach to a daily record - Medicine Organizer - Summary of Notes - and more REQUIREMENTS: - Internet Access required to sync data to your diary on epidiary.com Take Control and Get Started Today with EpiDiary. Please email comments and suggestions to info@irody.com

About

HydroFlow Ocean

This app transforms daily water intake into a growing virtual ocean filled with collectible marine creatures. Track your hydration, earn achievements, and visualize your progress with interactive widgets and Apple Watch integration.

Highlights
  • One-tap water logging
  • Living ocean visualization
  • Collectible marine creatures
  • Daily and weekly analytics
  • Home screen widget
  • Apple Watch integration
  • Optional Apple Health sync
Features
Read full description

HydroFlow Ocean turns daily hydration into a Living Ocean you grow over time. Hit your water goals and unlock original marine creatures across coral reef, open ocean, deep water, and the abyss—32 collectible creatures with your own ocean collection cards. KEY FEATURES • One-tap crystal button logging (long-press for beverages) • Living Ocean that grows as you stay consistent • Fixed reminders with next-day auto-scheduling • Today + 7-day analytics and achievement wall • Small Home Screen widget; Apple Watch progress and tap-to-add water • Optional Apple Health sync • Local-first: no account, no ads, no third-party trackers PRO (one-time lifetime unlock — no subscription) • Adaptive rolling reminders • 14-day and 30-day analytics • 30-day wall + monthly archives • Full ocean collection beyond the reef (32 creatures) • Medium widget + richer Watch beverage tools • Mood diary notes, more beverages, full share report Drink water. Build your ocean.

Screenshots

EpiDiary4 screens
HydroFlow Ocean4 screens

Verdict

The call

The clearest difference is review sentiment: HydroFlow Ocean at 100% against EpiDiary's 42%. HydroFlow Ocean also leads on rating (5.0 vs 4.5). EpiDiary's advantage is in-app purchases (none vs 1) and ratings volume (45 vs 3). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. HydroFlow Ocean sells 1 one-off in-app purchase. EpiDiary asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

HydroFlow Ocean holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: EpiDiary has 45 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 42% of EpiDiary's written reviews are positive against 100% of HydroFlow Ocean's.

UpkeepUpdate frequency

EpiDiary ships an update fortnightly, HydroFlow Ocean every 5 weeks. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

Scorecard6 real differences · 4 level
EpiDiary versus HydroFlow Ocean: the parameters behind the verdict, then further details
ParameterEpiDiaryHydroFlow Ocean
PriceFreeFree
Rating4.5 (45 ratings)5.0 (3 ratings) — better
Positive reviews41.7% of reviews100.0% of reviews — better
Number of ratings45 — better3
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS16.4 — better17.6
Further details — not scored
Size129 MB46 MB
Age rating12+12+
DeveloperIrody Inc.Ningzhe Wen

Customer experience

EpiDiary

All ratings45 ratings
Positive86.7%
Neutral2.2%
Negative11.1%
Written reviews60 reviews
Positive41.7%
Neutral15.0%
Negative43.3%

HydroFlow Ocean

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EpiDiary

No in-app purchases

1 purchases

HydroFlow Ocean

One-time1
  • HydroFlow Pro$3.99

Questions

Is EpiDiary free?
EpiDiary is free to download, with no in-app purchases.
Is HydroFlow Ocean free?
HydroFlow Ocean is free to download, with in-app purchases available.
Which has better reviews, EpiDiary or HydroFlow Ocean?
HydroFlow Ocean is rated higher. EpiDiary averages 4.5 out of 5 from 45 ratings, while HydroFlow Ocean averages 5.0 from 3 ratings.
Do EpiDiary or HydroFlow Ocean have ads?
Neither EpiDiary nor HydroFlow Ocean shows ads.
Which is updated more often, EpiDiary or HydroFlow Ocean?
EpiDiary ships an update fortnightly, and HydroFlow Ocean every 5 weeks. Most recently, EpiDiary was updated on October 15, 2026 and HydroFlow Ocean on October 7, 2026.

Other comparisons