# Bubbles vs PetDrinkDiary

The clearest difference is in-app purchases: PetDrinkDiary at none against Bubbles's 2. PetDrinkDiary also leads on update cadence (every 3 days vs every 8 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Bubbles sells 2 in-app purchases, starting at $4.99 per month. PetDrinkDiary asks for nothing beyond the download.

Bubbles ships an update every 8 days, PetDrinkDiary every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Bubbles | PetDrinkDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/petdrinkdiary/id6783237058/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 3 days** |
| Monetization | — | Free |
| Size | 24 MB | 36 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Sunil PM](https://appshunter.io/developer/1896290467) | [馨月 盘](https://appshunter.io/developer/1896618409) |

## What reviewers say

### Bubbles

[App page](https://appshunter.io/ios/app/bubbles-step-tracker-pet-fish/id6766446326)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $29.99 | per year |


### PetDrinkDiary

[App page](https://appshunter.io/ios/app/petdrinkdiary/id6783237058)

This app helps you track your daily water intake with the companionship of a virtual cat. It offers customizable reminders, progress visualization, and the ability to create shareable cards of your hydration achievements. The focus is on building a relaxed, healthy habit.

**Highlights:** Cat companion for motivation, Record various drink types, Daily and weekly progress views, Customizable reminders, Generate shareable achievement cards, Apple Health sync, Apple Watch and widget support

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Bubbles free?

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

### Is PetDrinkDiary free?

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

### Do Bubbles or PetDrinkDiary have ads?

Neither Bubbles nor PetDrinkDiary shows ads.

### Which is updated more often, Bubbles or PetDrinkDiary?

Bubbles ships an update every 8 days, and PetDrinkDiary every 3 days. Most recently, Bubbles was updated on October 31, 2026 and PetDrinkDiary on October 31, 2026.

---

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