# BDB Visitor vs Unique Diamax

The clearest difference is update cadence: Unique Diamax at every 11 days against BDB Visitor's every 2 months. BDB Visitor's advantage is iOS requirement (13.0 vs 15.0). 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.

BDB Visitor ships an update every 2 months, Unique Diamax every 11 days. The most recent releases landed on November 4, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | BDB Visitor | Unique Diamax |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Size | 15 MB | 64 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bharat Diamond Bourse](https://appshunter.io/developer/1300322288) | [Sarvadhi Solutions](https://appshunter.io/developer/1586247907) |

## What reviewers say

### BDB Visitor

[App page](https://appshunter.io/ios/app/bdb-visitor/id1308137198)

**Features:** macOS Compatibility

**In-app purchases:** none


### Unique Diamax

[App page](https://appshunter.io/ios/app/unique-diamax/id1560279795)

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

**In-app purchases:** none


## Frequently asked questions

### Is BDB Visitor free?

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

### Is Unique Diamax free?

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

### Do BDB Visitor or Unique Diamax have ads?

Neither BDB Visitor nor Unique Diamax shows ads.

### Which is updated more often, BDB Visitor or Unique Diamax?

BDB Visitor ships an update every 2 months, and Unique Diamax every 11 days. Most recently, BDB Visitor was updated on November 4, 2026 and Unique Diamax 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.*