# Expain vs Waterly Water Tracker

The clearest difference is ads: Expain at none against Waterly Water Tracker's shown. Expain also leads on iOS requirement (8.1 vs 16.4). Waterly Water Tracker's advantage is update cadence (every 2 months vs every 5 months). On price, in-app purchases and device support there is nothing between them.

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

Expain ships an update every 5 months, Waterly Water Tracker every 2 months. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Expain | Waterly Water Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Size | 64 MB | 40 MB |
| Requires iOS | **8.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Expain AS](https://appshunter.io/developer/1159660977) | [Claudio Fusillo](https://appshunter.io/developer/1520006843) |

## What reviewers say

### Expain

[App page](https://appshunter.io/ios/app/expain/id1159660978)

**Features:** macOS Compatibility

**In-app purchases:** none


### Waterly Water Tracker

[App page](https://appshunter.io/ios/app/waterly-water-tracker/id6760342153)

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

**In-app purchases:** none


## Frequently asked questions

### Is Expain free?

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

### Is Waterly Water Tracker free?

Waterly Water Tracker is free to download, with no in-app purchases.

### Do Expain or Waterly Water Tracker have ads?

Waterly Water Tracker shows ads; Expain does not.

### Which is updated more often, Expain or Waterly Water Tracker?

Expain ships an update every 5 months, and Waterly Water Tracker every 2 months. Most recently, Expain was updated on November 11, 2026 and Waterly Water Tracker on October 31, 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.*