# EXTENSION.app vs Synapse

The clearest difference is in-app purchases: Synapse at none against EXTENSION.app's 4. Synapse also leads on iOS requirement (16.6 vs 26.0). EXTENSION.app's advantage is device support (6 vs 1). On price, update cadence and ads there is nothing between them.

Both are free to download. EXTENSION.app sells 4 in-app purchases, starting at $0.99 per month. Synapse asks for nothing beyond the download.

EXTENSION.app ships an update every 5 weeks, Synapse every 2 months. The most recent releases landed on September 28, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | EXTENSION.app | Synapse |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.9K ratings)](https://appshunter.io/ios/app/extensionapp/id1533525753/reviews)** | — |
| Number of ratings | **4.9K** | — |
| Positive reviews | 77.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 143 MB | 20 MB |
| Requires iOS | 26.0 | **16.6** |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [X.app](https://appshunter.io/developer/1397532342) | [MikroStarTech](https://appshunter.io/developer/1451461286) |

## What reviewers say

### EXTENSION.app

[App page](https://appshunter.io/ios/app/extensionapp/id1533525753)

This app enhances video playback on iOS devices, enabling Picture-in-Picture mode for supported websites and apps. It allows for simultaneous playback of multiple videos, background audio, and provides extensive sharing and browser extension capabilities.

**Highlights:** Picture-in-Picture video mode, Simultaneous video playback, Background audio playback, Share extensions for videos, Safari browser extensions, iMessage extension for videos, Customizable shortcuts

**Features:** Safari Extension, Family Sharing, Apple Watch app, iMessage stickers

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EXTENSION+ Monthly | $0.99 | per month |
| EXTENSION+ Monthly for Family | $1.99 | per month |
| EXTENSION+ Yearly | $9.99 | per year |
| EXTENSION+ Yearly for Family | $19.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Works as described
- 💡 Useful for multitasking
- 🔒 No data collection
- 👍 Simple and straightforward

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🔋 Battery drain issues
- 🚫 Compatibility problems with some apps
- 💤 Automatic closing of the window after video ends

**Reported bugs**

- Picture-in-picture mode not working consistently
- Age-restricted videos unable to be viewed
- Playlist shuffling not working on iPad
- Freezing or crashing on certain devices

**Requested features**

- Add playback speed adjustment in PIP mode
- Implement a history or bookmarking feature
- Improve seamless transition to PIP mode
- Add support for more apps beyond just web-based ones
- Integrate with system-level PIP for better integration


### Synapse

[App page](https://appshunter.io/ios/app/synapse/id6756261199)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EXTENSION.app free?

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

### Is Synapse free?

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

### Do EXTENSION.app or Synapse have ads?

Neither EXTENSION.app nor Synapse shows ads.

### Which is updated more often, EXTENSION.app or Synapse?

EXTENSION.app ships an update every 5 weeks, and Synapse every 2 months. Most recently, EXTENSION.app was updated on September 28, 2026 and Synapse on September 20, 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.*