# Cluster vs TimeCheck iMessage Extension

The clearest difference is in-app purchases: TimeCheck iMessage Extension at none against Cluster's 6. TimeCheck iMessage Extension also leads on review sentiment (80% vs 56%). Cluster's advantage is ratings volume (22K vs 9). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Cluster sells 6 in-app purchases, starting at $4.99 per month. TimeCheck iMessage Extension asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Cluster against 4.9 for TimeCheck iMessage Extension. That said, the two scores are not equally well evidenced: Cluster has 22K ratings behind it against 9, so its average is the more settled of the two. Written reviews are what separate them: 56% of Cluster's written reviews are positive against 80% of TimeCheck iMessage Extension's.

Cluster ships an update every 4 weeks, TimeCheck iMessage Extension fortnightly. The most recent releases landed on October 17, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Cluster | TimeCheck iMessage Extension |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (22K ratings)](https://appshunter.io/ios/app/cluster/id596595032/reviews) | **[4.9 (9 ratings)](https://appshunter.io/ios/app/timecheck-imessage-extension/id1616256395/reviews)** |
| Number of ratings | **22K** | 9 |
| Positive reviews | 56.4% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 37 MB | 13 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod, Apple TV** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cluster Labs, Inc.](https://appshunter.io/developer/596595035) | [Daniel McCarthy](https://appshunter.io/developer/635693343) |

## What reviewers say

### Cluster

[App page](https://appshunter.io/ios/app/cluster/id596595032)

Create private groups to share photos and videos with specific people. Ideal for families, friends, or colleagues to share moments securely without broadcasting to a wider audience. Access your shared memories across mobile devices and the web.

**Highlights:** Create private sharing groups, Share photos and videos, Invite specific members, Web and mobile access, Relevant notifications, Secure and private sharing

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cluster Friend | $4.99 | per month |
| Cluster Family | $9.99 | per month |
| Cluster Pro | $19.99 | per month |
| Cluster Friend | $49.99 | per year |
| Cluster Family | $99.99 | per year |
| Cluster Pro | $199.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Great for sharing photos and videos
- 🔒 Allows private sharing with selected groups
- 💡 Helpful for keeping family connected
- 👍 Simple and effective interface

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🐛 Issues with photo/video uploads
- 🐛 Unreliable notifications
- 🐛 Glitchy performance after updates
- 🔍 Lack of search and organization features

**Reported bugs**

- App crashes on launch for some users
- Photos and videos fail to upload consistently
- Notification issues - not receiving updates
- Compatibility problems with newer Android devices
- Unexpected errors when trying to access accounts

**Requested features**

- Add ability to edit/delete posts
- Improve photo/video upload reliability
- Implement better notification system
- Add option to create galleries/albums within groups
- Enhance search and filtering capabilities


### TimeCheck iMessage Extension

[App page](https://appshunter.io/ios/app/timecheck-imessage-extension/id1616256395)

This iMessage extension simplifies scheduling by matching availability snapshots. It helps users find the best times to meet for social events, meetings, and activities without revealing specific schedule details.

**Highlights:** Matches availability snapshots, Finds best times to meet, iCal sync for availability, No schedule details visible, Add to calendar button, Works within iMessage threads

**In-app purchases:** none


## Frequently asked questions

### Is Cluster free?

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

### Is TimeCheck iMessage Extension free?

TimeCheck iMessage Extension is free to download, with no in-app purchases.

### Which has better reviews, Cluster or TimeCheck iMessage Extension?

TimeCheck iMessage Extension is rated higher. Cluster averages 4.8 out of 5 from 22K ratings, while TimeCheck iMessage Extension averages 4.9 from 9 ratings.

### Do Cluster or TimeCheck iMessage Extension have ads?

Neither Cluster nor TimeCheck iMessage Extension shows ads.

### Which is updated more often, Cluster or TimeCheck iMessage Extension?

Cluster ships an update every 4 weeks, and TimeCheck iMessage Extension fortnightly. Most recently, Cluster was updated on October 17, 2026 and TimeCheck iMessage Extension on September 26, 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.*