# ReHydration vs DrinkDay

The clearest difference is update cadence: DrinkDay at every 5 days against ReHydration's every 5 months. ReHydration's advantage is iOS requirement (10.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReHydration ships an update every 5 months, DrinkDay every 5 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ReHydration | DrinkDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/drinkday/id6446102738/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 63 MB | 2 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hardik Shah](https://appshunter.io/developer/1134931242) | [Tigerfish Productions LLC](https://appshunter.io/developer/694536313) |

## What reviewers say

### ReHydration

[App page](https://appshunter.io/ios/app/rehydration/id1300474093)

This application helps you build a consistent water drinking habit. It sends reminders, tracks your daily intake, and calculates personalized hydration goals based on your body weight, age, and lifestyle. Monitor your progress with historical data and share your achievements with friends.

**Highlights:** Personalized hydration goals, Daily reminders and alerts, Water intake logging, Intake history and graph view, Customizable notification frequency, Share daily intake with friends

**Features:** macOS Compatibility

**In-app purchases:** none


### DrinkDay

[App page](https://appshunter.io/ios/app/drinkday/id6446102738)

Easily monitor your water intake and receive helpful reminders to stay hydrated. Visualize your daily progress and identify areas for improvement to achieve your health goals.

**Highlights:** Hydration tracking, Drinking goal setting, Customizable reminders, Daily progress visualization, Improvement insights

**In-app purchases:** none


## Frequently asked questions

### Is ReHydration free?

ReHydration is free to download, with no in-app purchases.

### Is DrinkDay free?

DrinkDay is free to download, with no in-app purchases.

### Do ReHydration or DrinkDay have ads?

Neither ReHydration nor DrinkDay shows ads.

### Which is updated more often, ReHydration or DrinkDay?

ReHydration ships an update every 5 months, and DrinkDay every 5 days. Most recently, ReHydration was updated on October 13, 2026 and DrinkDay on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*