WaveKat Voice is a desktop softphone that signs in to your FRITZ!Box as an IP phone, so you can make and take calls on the landline numbers the box already has — from your Mac, Windows or Linux computer, with every call recorded and transcribed automatically. It needs no new provider and is free during the public beta. It works while your computer is on the same home or office network as the box. A call flow can answer the calls you cannot take, with a greeting and voicemail.
There are two parts: add an IP phone on the FRITZ!Box, then sign in to it from WaveKat Voice, where FRITZ!Box is in the guided provider list and the box’s address is filled in for you.
Prefer to enter it by hand? Use the IP phone’s username and password, with fritz.box as the domain — or the box’s own address, 192.168.178.1 by default, if fritz.box doesn’t work. Leave the other settings as they are. Pick FRITZ!Box in WaveKat Voice and the domain is filled in for you.
Setup details and prices checked in September 2026 against the provider’s own pages: FRITZ!: registering an IP phone on the FRITZ!Box · FRITZ!App Fon
| WaveKat Voice | FRITZ!App Fon | PhonerLite | |
|---|---|---|---|
| Price | Free during the public beta; paid later. Calls use your landline tariff. | Free for all FRITZ!Box users. Calls use your landline tariff. | Freeware — free for private and business use. |
| Platforms | Mac, Windows and Linux (the Windows build ships via the Microsoft Store). | Android and iOS, on phones and tablets. | Windows only. |
| Where it works | On the same home or office network as the box. | Over the box’s Wi-Fi, at home or in the office. | On the same network as the box, like any IP phone. |
| Records every call | Automatic — every call recorded the moment you hang up. | Not among its listed features. | Manual, per call, from the call’s menu (saved as a WAV file). |
| Written transcript | Live transcript, kept with the recording. | Not among its listed features. | On request: transcribes a saved recording on your PC. |
| Searchable call history | Calls, recordings, and transcripts in one searchable history. | Call list. | Call log; recordings are noted in it. |
| FRITZ!Box setup | Add an IP phone on the box, then pick FRITZ!Box from a list and enter its username and password. | Sets itself up on the box as an IP phone from the app. | Add an IP phone on the box, then enter the generic SIP fields yourself. |
| Answering calls & voicemail | A call flow answers for you — greeting, opening hours, menu, voicemail or transfer — and the message is transcribed. | No answering of its own — the FRITZ!Box answering machine takes messages, and the MyFRITZ!App tells you about them. | No answering of its own. |
| Logging calls in your CRM | Connect HubSpot once and every call files itself on the matching contact, transcript included. Part of Pro, free during early access. | Not among its listed features. | Not built in; it offers scripting and a command line. |
| Mobile | Desktop only — no phone app. | Made for smartphones and tablets, with Bluetooth headset support. | No mobile app (Windows desktop only). |
A FRITZ!Box is a home and office router that doubles as a small phone system: it holds your landline numbers and lets the phones on your network use them, including up to 10 IP phones. For smartphones and tablets, FRITZ! offers its own free FRITZ!App Fon — and any SIP softphone, such as WaveKat Voice, can sign in as an IP phone while it is on the same network as the box.
Yes. Add an IP phone on the FRITZ!Box, then sign in to it from a SIP softphone on your computer. WaveKat Voice has FRITZ!Box in its guided provider list, runs on Mac, Windows and Linux, and records and transcribes every call automatically. Your computer has to be on the same network as the box.
In the FRITZ!Box user interface (fritz.box), go to Telefonie → Telefoniegeräte → Neues Gerät einrichten, choose Telefon and then LAN/WLAN (IP-Telefon). Pick a username and a password of at least 8 characters each — the password clearly different from the username — choose the outgoing and incoming numbers, and save with Übernehmen. The box may ask you to confirm on the box itself.
Not directly. The FRITZ!Box only accepts IP phones from its own network, and not from its guest network. FRITZ! advises against allowing sign-in from the internet; connect to your home network over a VPN instead.
Check that the IP phone’s username and password are each at least 8 characters, and that your computer is on the main network, not the guest network. If fritz.box doesn’t work as the domain, use the box’s address, 192.168.178.1 by default. If it still fails, FRITZ! recommends deleting the IP phone, restarting the box, and setting it up again.
By default, the FRITZ!Box only lets IP phones call domestic and emergency numbers. Allow other destinations under Telefonie → Eigene Rufnummern → Anschlusseinstellungen → Sicherheit.
Yes. Dial ** followed by a phone’s internal number, listed under Telefonbuch → Interne Nummern on the box, or **9 to ring them all. The FRITZ!Box takes up to 10 IP phones, including any FRITZ!App Fon.
The FRITZ!App Fon is for Android and iOS phones and tablets. On a computer, use a SIP softphone signed in as an IP phone: WaveKat Voice runs on Mac, Windows and Linux (on Windows 10 and 11 from the Microsoft Store), and PhonerLite runs on Windows.
Yes. A call flow answers the line for you with a greeting, checks your opening hours, offers a phone menu, takes a message, or transfers the call — and the message is recorded and transcribed like any other call, so you can read it instead of listening back. You can also pick the call up while someone is still leaving one. The greeting, taking a message and ringing you are free; phone menus, opening hours and transfers are part of Pro, free for a year during early access. The flow runs on your own computer, so the app has to be running for it to answer — otherwise the call rings your other phones or goes to the FRITZ!Box answering machine, if you have one set up.
Questions, feedback, or a device you wish we supported? Email is the best way to reach us — we read every message and reply as soon as we can.
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