# Custom Observer App vs HappyWhale

The clearest difference is ads: Custom Observer App at none against HappyWhale's shown. Custom Observer App also leads on update cadence (every 3 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Custom Observer App ships an update every 3 weeks, HappyWhale every 2 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Custom Observer App | HappyWhale |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/happywhale-ai-notification/id6751800747/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | — | Ad-supported |
| Size | 151 MB | 45 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Aleut Community of St. Paul Island Tribal Government](https://appshunter.io/developer/1329178887) | [Town Studio](https://appshunter.io/developer/1702116716) |

## What reviewers say

### Custom Observer App

[App page](https://appshunter.io/ios/app/custom-observer-app/id6736385664)

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

**In-app purchases:** none


### HappyWhale

[App page](https://appshunter.io/ios/app/happywhale-ai-notification/id6751800747)

Receive AI-powered notifications that offer comfort and allow you to create personalized reminders. This utility app aims to enhance your daily experience by filtering out unwanted ads and providing a more tailored notification system.

**Highlights:** AI-powered notifications, Personalized reminder creation, Ad-free experience, Comforting notifications

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

**In-app purchases:** none


## Frequently asked questions

### Is Custom Observer App free?

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

### Is HappyWhale free?

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

### Do Custom Observer App or HappyWhale have ads?

HappyWhale shows ads; Custom Observer App does not.

### Which is updated more often, Custom Observer App or HappyWhale?

Custom Observer App ships an update every 3 weeks, and HappyWhale every 2 months. Most recently, Custom Observer App was updated on October 30, 2026 and HappyWhale on October 24, 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.*