DUSphone vs Tridense Contacts
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DUSphone
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.
- 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
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dus.net GmbH proudly presents DUSphone – the VoIP softphone for your dus.net line. Make encrypted, HD-quality calls straight from your iPhone: to landlines, mobile numbers, and other dus.net lines. All you need is a dus.net plan – ready in minutes, including a starting balance of €0.45 for your first calls. See the plans at www.dus.net. Your benefits: • Encrypted calling over TLS and SRTP – your conversations stay private • HD voice quality powered by the Opus codec • Native call integration via Apple CallKit – calls appear on your lock screen and in your recents, just like regular calls • Always reachable: incoming calls ring reliably, even when your iPhone is locked or the app is closed (VoIP push) • Call landlines and mobile numbers – and receive calls on your dus.net number • Fast setup by scanning a QR code from the customer center – no password to type • Manage several lines at once (multi-account) • Company directory and device contacts – callers are matched by name • Keep an eye on your prepaid balance in euros at any time • Show or hide your caller ID per call (call anonymously) • In-call DTMF, hold, speaker, Bluetooth, and call history Privacy-friendly: no tracking, no ads. DUSphone is built on open-source software (baresip); the open-source licenses can be viewed in the app. Requirement: DUSphone needs a VoIP line at dus.net. More information at www.dus.net.
Tridense Contacts
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The Tridense Contacts app can be used as a reference for both internal and external contacts.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | DUSphone | Tridense Contacts |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| Update frequency | Weekly — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | dus.net GmbH | Firm IT |
In-app purchases
DUSphone
No in-app purchases
Tridense Contacts
No in-app purchases
Questions
Is DUSphone free?
Is Tridense Contacts free?
Do DUSphone or Tridense Contacts have ads?
Which is updated more often, DUSphone or Tridense Contacts?
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