# BDSU vs Clusterix Email

The clearest difference is update cadence: Clusterix Email at every 2 weeks against BDSU's every 4 months. BDSU's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

BDSU ships an update every 4 months, Clusterix Email every 2 weeks. The most recent releases landed on September 18, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | BDSU | Clusterix Email |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/clusterix-email/id6478543435/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 17 MB | 60 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Bundesverband Deutscher Studentischer Unternehmensberatungen e. V.](https://appshunter.io/developer/1448360743) | [innoscripta SE](https://appshunter.io/developer/1546207706) |

## What reviewers say

### BDSU

[App page](https://appshunter.io/ios/app/bdsu-treffen/id1367000232)

**Features:** macOS Compatibility

**In-app purchases:** none


### Clusterix Email

[App page](https://appshunter.io/ios/app/clusterix-email/id6478543435)

Streamline your communication with an advanced email client. Features include a signature editor, customizable templates, an AI assistant for composing and managing emails, and scheduled sending. Organize and view your messages with an intuitive interface.

**Highlights:** Customizable signature editor, Intuitive email editor, Diverse customizable templates, AI assistant for composing and inbox management, Scheduled email sending, User-friendly email viewing interface

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BDSU free?

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

### Is Clusterix Email free?

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

### Do BDSU or Clusterix Email have ads?

Neither BDSU nor Clusterix Email shows ads.

### Which is updated more often, BDSU or Clusterix Email?

BDSU ships an update every 4 months, and Clusterix Email every 2 weeks. Most recently, BDSU was updated on September 18, 2026 and Clusterix Email on August 22, 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.*