Comparison

Empty Fasting vs Hydro Dots

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

Head to head
About

Empty Fasting

This app helps users focus on a single fasting period at a time, offering both overnight and daytime schedules. It provides customizable themes and icons, home screen widgets, and tracks fasting streaks and trends with encouraging messages.

Highlights
  • Single fast focus
  • Home screen widgets
  • Overnight and daytime schedules
  • Customizable themes and icons
  • Streak and trend statistics
  • Encouragement during fasts
Read full description

· Full-focus on one fast at a time · Home screen widgets & live activities · Overnight and daytime fasting schedules · Make it yours with 6 themes and 18 icons · Statistics for your streaks and trends · Encouragement throughout your fasts

About

Hydro Dots

Features
Read full description

Hydro Dots is a water tracker that draws your day as a rising water level, one dot at a time. Tap once to log a cup, a mug, or a bottle. The water climbs. That is the whole idea. WHAT IT DOES • One tap to log — your usual sizes sit on the first screen. Custom amounts and drink types are one tap further. • Not every drink counts the same — coffee, tea, juice and the rest are converted by their hydration index, so what you log is what your body keeps. • A goal that follows your day — body weight, temperature, humidity, UV and activity shape the target. It settles once, the first time you open the app each day, so it never moves under you. • Reminders that know where you stand — each one carries how much you have had and the pace that would get you there. • History and recap — a week of bars, a month of dots, a streak counter, and the month's total turned into things you can picture: bottles, kettles, sugar you avoided. • Widgets — log from the home screen or the lock screen without opening the app. A month of dots fits on the large one. • Shortcuts and Siri — log a drink or ask what you have had today, hands free. Every action is available to build your own routines. • Apple Health — records can be written to Health, and removing a record takes it back out. PRO A one-time purchase. No subscription. • No ads • Every theme — seven palettes, from cream LCD to OLED black • iCloud sync — records and drinks across your devices PRIVACY What you drink stays on your device. Your records are not sent anywhere unless you turn on iCloud sync, and then they go to your own iCloud, not to us.

Screenshots

Empty Fasting4 screens
Hydro Dots4 screens

Verdict

The call

The clearest difference is in-app purchases: Empty Fasting at none against Hydro Dots's 4. Empty Fasting also leads on ads (none vs shown) and iOS requirement (17.0 vs 26.0). Hydro Dots's advantage is update cadence (daily vs every 3 days). On price and device support 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. Hydro Dots sells 4 one-off in-app purchases. Empty Fasting asks for nothing beyond the download.

UpkeepUpdate frequency

Empty Fasting ships an update every 3 days, Hydro Dots daily. The most recent releases landed on September 28, 2026 and September 25, 2026 respectively.

Scorecard4 real differences · 6 level
Empty Fasting versus Hydro Dots: the parameters behind the verdict, then further details
ParameterEmpty FastingHydro Dots
PriceFreeFree
Rating4.7 (68 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings68 — better—
Update frequencyEvery 3 daysDaily — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better26.0
Further details — not scored
Size169 MB43 MB
Age rating17+4+
DeveloperLight NudgeKengo Tate

Bugs and requests

Empty Fasting

Reported bugs

1 issue
  • Fast reminders still sent even if the fasting session is currently active.

Requested features

12 requests
  • Custom fasting length (days/hours)
  • More options for ADF
  • Apple Health integration
  • Ability to edit start time of a running timer
  • Set multiple start fast reminders
Show 7 more
  • Option to set app to allow fasting from specific things (alcohol, meat)
  • Manual time input for fasting
  • Apple Watch addition
  • Watch widget
  • Start fasts automatically
  • Ability to start countdown from a previous time
  • Ability to add a fast started yesterday

Hydro Dots

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Empty Fasting

No in-app purchases

4 purchases

Hydro Dots

One-time4
  • A drop$0.99
  • A glass$2.99
  • A bottle$5.99
Show 1 more
  • Pro — Founding Member$5.99

Questions

Is Empty Fasting free?
Empty Fasting is free to download, with no in-app purchases.
Is Hydro Dots free?
Hydro Dots is free to download, with in-app purchases available.
Do Empty Fasting or Hydro Dots have ads?
Hydro Dots shows ads; Empty Fasting does not.
Which is updated more often, Empty Fasting or Hydro Dots?
Empty Fasting ships an update every 3 days, and Hydro Dots daily. Most recently, Empty Fasting was updated on September 28, 2026 and Hydro Dots on September 25, 2026.

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