HydroTimer vs Smart TODO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HydroTimer
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Water Clock is a smart drinking water health manager app. It helps users establish scientific drinking habits, records daily water intake through an intuitive interface, provides personalized drinking reminders, and generates detailed health data statistics. The app adopts a simple iOS design style, supports users to set personal drinking goals, view historical drinking records and health trend analysis. Through the smart reminder function, it ensures that users replenish water on time and develop good drinking habits, thereby improving their overall health level. The app also provides health advice and drinking knowledge to help users understand the importance of scientific drinking, making health management simple and interesting.
Smart TODO
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Zhixu - Smart TODO List that makes task management simple and efficient. Features elegant design with PingFang SC font and carefully chosen color scheme for intuitive user experience. Core features include smart categorization, priority settings, and progress tracking to help you manage work and daily life effortlessly. Whether for daily planning or project management, Zhixu makes your life more organized and productivity enhanced, keeping every day well-structured.
Screenshots
Verdict
HydroTimer and Smart TODO are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | HydroTimer | Smart TODO |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Aurelis Limited | 圣财 卢 |
In-app purchases
HydroTimer
No in-app purchases
Smart TODO
No in-app purchases









