Keep vs Hydro Dots
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Keep
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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.
Hydro Dots
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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 โข One tap to log โ your usual sizes sit on the first screen. Custom amounts and drink types are one tap further. โข 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. โข 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. โข Reminders that know where you stand โ each one carries how much you have had and the pace that would get you there. โข 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. โข Widgets โ log from the home screen or the lock screen without opening the app. A month of dots fits on the large one. โข 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. โข Apple Health โ records can be written to Health, and removing a record takes it back out. PRO A one-time purchase. No subscription. โข No ads โข Every theme โ seven palettes, from cream LCD to OLED black โข 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
Verdict
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
Both are free to download. Hydro Dots sells 4 one-off in-app purchases. Keep asks for nothing beyond the download.
Keep ships an update every 2 months, Hydro Dots daily. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.
| Parameter | Keep | Hydro Dots |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Daily โ better |
| Ads | No โ better | Yes |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 โ better | 26.0 |
| Further details โ not scored | ||
| Size | 26 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | yongheon choi | Kengo Tate |
In-app purchases
Keep
No in-app purchases
Hydro Dots
- A drop$0.99
- A glass$2.99
- A bottle$5.99
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- Pro โ Founding Member$5.99









