# Pebbles App vs Waterline

The clearest difference is device support: Waterline at 3 against Pebbles App's 1. Waterline also leads on iOS requirement (13.0 vs 16.6). On price, update cadence, 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.

Pebbles App ships an update every 10 months, Waterline every 16 months. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Pebbles App | Waterline |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pebbles-app/id1338684559/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 16 months |
| Monetization | Free | — |
| Size | 160 MB | 114 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Universität Zürich](https://appshunter.io/developer/1055588978) | [Games for Citizens](https://appshunter.io/developer/1573438126) |

## What reviewers say

### Pebbles App

[App page](https://appshunter.io/ios/app/pebbles-app/id1338684559)

This app helps parents track and celebrate their child's development from birth to age 6. It provides scientific insights, tips, and a digital diary to document milestones with photos and text.

**Highlights:** Age-adapted development steps, Explanatory illustrations, Tips for promoting development, Progress monitoring and documentation, Personal diary with photos, Shareable milestones, Downloadable PDF diary

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

**In-app purchases:** none


### Waterline

[App page](https://appshunter.io/ios/app/waterline/id6446896688)

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

**In-app purchases:** none


## Frequently asked questions

### Is Pebbles App free?

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

### Is Waterline free?

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

### Do Pebbles App or Waterline have ads?

Neither Pebbles App nor Waterline shows ads.

### Which is updated more often, Pebbles App or Waterline?

Pebbles App ships an update every 10 months, and Waterline every 16 months. Most recently, Pebbles App was updated on October 24, 2026 and Waterline on October 5, 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.*