Comparison

Keep vs Hydro Dots

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

Head to head
About

Keep

Features
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Translation of Main Features for Diet Management App 1. Score Screen The accumulated score is displayed based on the saved diet. You can check the number of diet evaluations in a table. 2. Diet List Screen You can view the saved diets. You can add a diet by tapping the + button. 3. Diet Management Screen You can add a new diet. You can delete, modify, and check saved diets.

About

Hydro Dots

Features
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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 โ€ข One tap to log โ€” your usual sizes sit on the first screen. Custom amounts and drink types are one tap further. โ€ข Not every drink counts the same โ€” coffee, tea, juice and the rest are converted by their hydration index, so what you log is what your body keeps. โ€ข A goal that follows your day โ€” 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. โ€ข Reminders that know where you stand โ€” each one carries how much you have had and the pace that would get you there. โ€ข History and recap โ€” 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. โ€ข Widgets โ€” log from the home screen or the lock screen without opening the app. A month of dots fits on the large one. โ€ข Shortcuts and Siri โ€” log a drink or ask what you have had today, hands free. Every action is available to build your own routines. โ€ข Apple Health โ€” records can be written to Health, and removing a record takes it back out. PRO A one-time purchase. No subscription. โ€ข No ads โ€ข Every theme โ€” seven palettes, from cream LCD to OLED black โ€ข iCloud sync โ€” 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

Keep4 screens
Hydro Dots4 screens

Verdict

The call

The clearest difference is in-app purchases: Keep at none against Hydro Dots's 4. Keep also leads on ads (none vs shown) and iOS requirement (15.0 vs 26.0). Hydro Dots's advantage is update cadence (daily vs every 2 months). On price and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Hydro Dots sells 4 one-off in-app purchases. Keep asks for nothing beyond the download.

UpkeepUpdate frequency

Keep ships an update every 2 months, Hydro Dots daily. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

Scorecard4 real differences ยท 2 level
Keep versus Hydro Dots: the parameters behind the verdict, then further details
ParameterKeepHydro Dots
PriceFreeFree
Update frequencyEvery 2 monthsDaily โ€” better
AdsNo โ€” betterYes
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 โ€” better26.0
Further details โ€” not scored
Size26 MB43 MB
Age rating4+4+
Developeryongheon choiKengo Tate

In-app purchases

None

Keep

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 โ€” Founding Member$5.99

Questions

Is Keep free?
Keep 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 Keep or Hydro Dots have ads?
Hydro Dots shows ads; Keep does not.
Which is updated more often, Keep or Hydro Dots?
Keep ships an update every 2 months, and Hydro Dots daily. Most recently, Keep was updated on October 25, 2026 and Hydro Dots on October 11, 2026.

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