# H2O vs WaterFlow

The clearest difference is rating: H2O at 4.5 against WaterFlow's 3.0. H2O also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). WaterFlow's advantage is review sentiment (100% vs 85%) and iOS requirement (17.0 vs 26.0). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. H2O sells 4 in-app purchases, starting at $1.99 per month and WaterFlow sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

H2O holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: H2O has 175 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 85% of H2O's written reviews are positive against 100% of WaterFlow's, so the app with the better star average is not the one people write more warmly about.

H2O ships an update every 3 days, WaterFlow every 2 weeks. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | H2O | WaterFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (175 ratings)](https://appshunter.io/ios/app/h2o-water-tracker/id1161140846/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/waterflow-hydration-log/id6747625932/reviews) |
| Number of ratings | **175** | 1 |
| Positive reviews | 84.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | Free | Free |
| Size | 48 MB | 16 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Lunarbits LLC](https://appshunter.io/developer/6799532918) | [Hakan FIRAT](https://appshunter.io/developer/1822075353) |

## What reviewers say

### H2O

[App page](https://appshunter.io/ios/app/h2o-water-tracker/id1161140846)

This application helps you monitor your daily water consumption to ensure you stay adequately hydrated. It offers a visually appealing interface with features for quickly logging intake and reviewing your progress.

**Highlights:** Log water intake quickly, Preset water amounts, Weekly intake graph, Full history of entries, HealthKit integration, Intuitive interface

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| H2O Pro Monthly | $1.99 | per month |
| H2O Pro Yearly | $9.99 | per year |
| H2O Pro Yearly | $9.99 | per year |
| H2O Pro Lifetime | $19.99 | one-time |

**What reviewers like**

- 👍 Simple and intuitive interface
- 💰 Free to use
- 🚫 Ad-free experience
- ✨ Clean and minimalist design
- 🚀 Quick and easy logging

**What reviewers complain about**

- 🐛 App crashes when accessing settings
- 🐛 App shuts off when accessing settings
- 🐛 Graph feature not working
- 💡 Missing reminder notifications
- 💡 Cannot edit previous day's entries

**Reported bugs**

- App crashes when accessing settings
- App shuts off when accessing settings
- Graph feature not working
- App closes when goal is reached
- Glitches when reaching goal

**Requested features**

- Add reminder notifications
- Allow editing of previous day's entries
- Add metric units (ml/L)
- Add widget support
- Add export to HealthKit option


### WaterFlow

[App page](https://appshunter.io/ios/app/waterflow-hydration-log/id6747625932)

This app helps you maintain consistent hydration with smart reminders, quick logging, and insightful tracking. It offers features like custom schedules, Apple Watch integration, and progress monitoring to encourage healthy habits.

**Highlights:** Smart, customizable reminders, Fast water logging with custom sizes, Track on Apple Watch, widgets, and Live Activity, Recover missed entries, Hydration insights and progress tracking, Apple Health sync

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Yearly | $14.99 | per year |
| Premium Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is H2O free?

H2O is free to download, with in-app purchases available.

### Is WaterFlow free?

WaterFlow is free to download, with in-app purchases available.

### Which has better reviews, H2O or WaterFlow?

H2O is rated higher. H2O averages 4.5 out of 5 from 175 ratings, while WaterFlow averages 3.0 from 1 ratings.

### Do H2O or WaterFlow have ads?

WaterFlow shows ads; H2O does not.

### Which is updated more often, H2O or WaterFlow?

H2O ships an update every 3 days, and WaterFlow every 2 weeks. Most recently, H2O was updated on November 2, 2026 and WaterFlow 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.*