Freedom251 › Softphone and calling apps
Groundwire
What Groundwire is
Groundwire is a SIP softphone for business calling on Android and iOS. It requires at least one SIP account from a service provider and lets you add multiple accounts with separate settings. Acrobits describes compatibility with standard SIP services and more than 80 VoIP providers. Calling tools include transfers, conferencing, voicemail, call recording, and call control. Busy Lamp Field indicates whether quick-dial contacts are available, ringing, or on another call. You can switch between Wi-Fi and mobile data to use a business line away from the office. Security options include TLS, SRTP, SDES, ZRTP, and DTLS, and biometric authentication can protect access to the app. Instant messaging is supported; traditional SMS requires a compatible provider or configured web service, while voicemail requires provider support. Groundwire has no native Windows or macOS application. The listed Groundwire plan costs 9.99 USD as a one-time purchase, with separate iOS and Android purchases and calling rates charged separately by the SIP provider.
Who it suits
Groundwire is aimed at people and business teams with heavy daily calling needs who already use a SIP provider. It suits mobile users needing business calling, messaging, and call controls on Android or iOS.
What it does well
- Supports multiple SIP accounts
- Includes transfers, conferencing, voicemail, and recording
- Works over Wi-Fi and mobile data
- Offers several security protocols
- Busy Lamp Field shows contact call status
What to know first
- Requires a SIP account to function
- No native Windows or macOS app
- Separate purchase for iOS and Android
- Calling rates charged separately by SIP provider
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Groundwire | One-time purchase; no recurring fee. As of July 2026. · Separate purchase for iOS and Android; calling rates charged by SIP provider separately | $9.99, paid once |
As acrobits.net lists them, read 8 Oct 2026. The maker's own page has the final word.
Verdict
Groundwire provides a broad mobile SIP calling toolkit, including account management, recording, conferencing, and security controls. Its usefulness depends on having a compatible SIP provider, and desktop users are not supported by native apps.
Facts from Groundwire's own pages
- Business presence
- Busy Lamp Field shows whether quick-dial contacts are off call, ringing, or on a call. · acrobits.net, 8 Oct 2026
- Calling features
- It supports call transfers, conferencing, voicemail, call recording, and call control. · acrobits.net, 8 Oct 2026
- Desktop availability
- Acrobits says Groundwire has no native Windows or macOS app and is available only on Android and iOS. · faq.acrobits.net, 8 Oct 2026
- Device lock
- Groundwire can require device biometric authentication before users access app functionality. · acrobits.net, 8 Oct 2026
- Encryption
- Security settings include TLS, SRTP, SDES, ZRTP, and DTLS. · acrobits.net, 8 Oct 2026
- Founded
- 2008 · acrobits.net, 28 Sept 2026
- Intended users
- Acrobits positions Groundwire for users with heavy daily calling needs, including business teams. · acrobits.net, 8 Oct 2026
- Messaging limit
- Groundwire supports instant messaging, while traditional SMS requires a compatible VoIP provider or a configured web service. · faq.acrobits.net, 8 Oct 2026
- Mobile connectivity
- The product page says users can switch between Wi-Fi and mobile data and use their business line while away from the office. · acrobits.net, 8 Oct 2026
- Provider compatibility
- Acrobits describes the app as compatible with standard SIP services and over 80 VoIP providers. · acrobits.net, 8 Oct 2026
- Setup requirement
- Groundwire requires at least one SIP account from a service provider to function. · acrobits.net, 8 Oct 2026
- SIP accounts
- Users can add multiple SIP accounts and configure account-specific settings. · acrobits.net, 8 Oct 2026
- Support
- Acrobits provides a support ticket form and lists [email protected] for help. · acrobits.net, 8 Oct 2026
- Voicemail requirement
- Voicemail features work only when the user's SIP provider offers voicemail service. · faq.acrobits.net, 8 Oct 2026
- What it does
- Groundwire is a SIP softphone app for business calling on iOS and Android. · acrobits.net, 8 Oct 2026
Where Groundwire stands on Freedom251
- Softphone and calling apps#31 of 33