# DUSphone vs Tridense Contacts

The clearest difference is update cadence: DUSphone at weekly against Tridense Contacts's every 6 months. Tridense Contacts's advantage is iOS requirement (15.0 vs 17.0). 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.

DUSphone ships an update weekly, Tridense Contacts every 6 months. The most recent releases landed on October 23, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | DUSphone | Tridense Contacts |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 months |
| Monetization | Free | — |
| Size | 11 MB | 10 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [dus.net GmbH](https://appshunter.io/developer/381540677) | [Firm IT](https://appshunter.io/developer/453236391) |

## What reviewers say

### DUSphone

[App page](https://appshunter.io/ios/app/dusphone/id498522414)

This VoIP softphone allows you to make encrypted, HD-quality calls to landlines, mobile numbers, and other lines directly from your iPhone. It offers seamless integration with your device and ensures your conversations remain private. Manage multiple lines and keep track of your prepaid balance with ease.

**Highlights:** Encrypted calling (TLS/SRTP), HD voice quality (Opus codec), Native call integration (Apple CallKit), Reliable incoming calls (VoIP push), Call landlines and mobile numbers, Multi-account management, Caller ID management

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

**In-app purchases:** none


### Tridense Contacts

[App page](https://appshunter.io/ios/app/tridense-contacts/id1514405838)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DUSphone free?

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

### Is Tridense Contacts free?

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

### Do DUSphone or Tridense Contacts have ads?

Neither DUSphone nor Tridense Contacts shows ads.

### Which is updated more often, DUSphone or Tridense Contacts?

DUSphone ships an update weekly, and Tridense Contacts every 6 months. Most recently, DUSphone was updated on October 23, 2026 and Tridense Contacts on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*