# mySMARTmobile vs Let's Hydrate

The clearest difference is rating: Let's Hydrate at 5.0 against mySMARTmobile's 3.0. Let's Hydrate also leads on update cadence (every 4 days vs every 3 weeks). mySMARTmobile's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Let's Hydrate sells 3 in-app purchases, starting at $2.99 per month. mySMARTmobile asks for nothing beyond the download.

Let's Hydrate holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

mySMARTmobile ships an update every 3 weeks, Let's Hydrate every 4 days. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | mySMARTmobile | Let's Hydrate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/mysmartmobile/id1546095478/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lets-hydrate-water-reminder/id6504602470/reviews)** |
| Number of ratings | **2** | 1 |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 43 MB | 99 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Emory University](https://appshunter.io/developer/387102326) | [Shanghai Fubian Technology Co., Ltd.](https://appshunter.io/developer/1753012946) |

## What reviewers say

### mySMARTmobile

[App page](https://appshunter.io/ios/app/mysmartmobile/id1546095478)

This app supports research study participants by managing study activities, scheduling visits, and providing access to results and surveys. It allows for secure document transfer and custom reminders, but requires registration by a study administrator.

**Highlights:** Manage study activities and timing, Self-schedule visits, Receive notifications, Update contact information, Access lab results, Securely transfer documents, Complete web-based surveys or quizzes

**Features:** macOS Compatibility

**In-app purchases:** none


### Let's Hydrate

[App page](https://appshunter.io/ios/app/lets-hydrate-water-reminder/id6504602470)

This app helps you build consistent water drinking habits with personalized reminders and goal setting. Track your intake, analyze your progress with charts, and stay motivated through challenges to maintain optimal hydration for better health.

**Highlights:** Daily intake reminders, Customizable cups and units, Intake charts and logs, Gamified tracking, Permanent membership challenges

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $2.99 | per month |
| 1 Year | $9.99 | per year |
| Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is mySMARTmobile free?

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

### Is Let's Hydrate free?

Let's Hydrate is free to download, with in-app purchases available.

### Which has better reviews, mySMARTmobile or Let's Hydrate?

Let's Hydrate is rated higher. mySMARTmobile averages 3.0 out of 5 from 2 ratings, while Let's Hydrate averages 5.0 from 1 ratings.

### Do mySMARTmobile or Let's Hydrate have ads?

Let's Hydrate shows ads; mySMARTmobile does not.

### Which is updated more often, mySMARTmobile or Let's Hydrate?

mySMARTmobile ships an update every 3 weeks, and Let's Hydrate every 4 days. Most recently, mySMARTmobile was updated on October 29, 2026 and Let's Hydrate on October 30, 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.*