# Correlation Finder vs Input Hydration

The clearest difference is review sentiment: Input Hydration at 100% against Correlation Finder's 0%. Input Hydration also leads on rating (5.0 vs 2.0) and update cadence (daily vs every 2 months). Correlation Finder's advantage is iOS requirement (13.0 vs 17.4). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Input Hydration holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews point the same way: 0% of Correlation Finder's written reviews are positive against 100% of Input Hydration's.

Correlation Finder ships an update every 2 months, Input Hydration daily. The most recent releases landed on September 28, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Correlation Finder | Input Hydration |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (2 ratings)](https://appshunter.io/ios/app/correlation-finder/id6497331166/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/input-hydration/id6670407777/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | Free |
| Size | 68 MB | 1 MB |
| Requires iOS | **13.0** | 17.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Livanda - Internetkliniken AB](https://appshunter.io/developer/1607972909) | [Shafqat Rahman](https://appshunter.io/developer/1743700538) |

## What reviewers say

### Correlation Finder

[App page](https://appshunter.io/ios/app/correlation-finder/id6497331166)

Discover how your daily habits impact your health. Track sleep, diet, exercise, and mood to uncover hidden correlations. Visualize data with clear graphs and diagrams for deeper well-being insights.

**Highlights:** Track sleep, exercise, diet, and mood, Create custom tracking parameters, Analyze correlations between habits and health, Visualize data with graphs and diagrams, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Input Hydration

[App page](https://appshunter.io/ios/app/input-hydration/id6670407777)

Easily monitor your daily water intake with customizable goals and real-time progress tracking. View your consumption in ounces, liters, and gallons, with options for light and dark modes. Undo mistakes or reset entries effortlessly.

**Highlights:** Track daily water intake, Set personalized hydration goals, View progress in ounces, liters, gallons, Light and dark mode options, Undo and reset intake entries, Real-time visual progress tracker

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Correlation Finder free?

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

### Is Input Hydration free?

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

### Which has better reviews, Correlation Finder or Input Hydration?

Input Hydration is rated higher. Correlation Finder averages 2.0 out of 5 from 2 ratings, while Input Hydration averages 5.0 from 3 ratings.

### Do Correlation Finder or Input Hydration have ads?

Neither Correlation Finder nor Input Hydration shows ads.

### Which is updated more often, Correlation Finder or Input Hydration?

Correlation Finder ships an update every 2 months, and Input Hydration daily. Most recently, Correlation Finder was updated on September 28, 2026 and Input Hydration on October 16, 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.*