# Hydro Dots vs Rouge

The clearest difference is ads: Rouge at none against Hydro Dots's shown. Rouge also leads on iOS requirement (16.4 vs 26.0). Hydro Dots's advantage is update cadence (daily vs weekly). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Hydro Dots sells 4 one-off in-app purchases and Rouge sells 4 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Hydro Dots ships an update daily, Rouge weekly. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Hydro Dots | Rouge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Weekly |
| Size | 43 MB | 67 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Kengo Tate](https://appshunter.io/developer/1458012620) | [Lische Dynamics](https://appshunter.io/developer/6795241607) |

## What reviewers say

### Hydro Dots

[App page](https://appshunter.io/ios/app/hydro-dots/id6794577673)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A drop | $0.99 | one-time |
| A glass | $2.99 | one-time |
| A bottle | $5.99 | one-time |
| Pro — Founding Member | $5.99 | one-time |


### Rouge

[App page](https://appshunter.io/ios/app/rouge-private-period-tracker/id6795241605)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rouge Premium | $8.99 | per month |
| Rouge Premium Annual | $39.99 | per year |
| Single Report | $1.99 | one-time |
| Rouge Lifetime | $99.99 | one-time |


## Frequently asked questions

### Is Hydro Dots free?

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

### Is Rouge free?

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

### Do Hydro Dots or Rouge have ads?

Hydro Dots shows ads; Rouge does not.

### Which is updated more often, Hydro Dots or Rouge?

Hydro Dots ships an update daily, and Rouge weekly. Most recently, Hydro Dots was updated on October 31, 2026 and Rouge on October 24, 2026.

---

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