AbtoVoIPClient vs modulus SoftPhone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AbtoVoIPClient
This application provides voice and video calling capabilities, along with text chat, for users with SIP accounts. It supports direct calls between clients and offers secure communication options. The app integrates with native iOS call features for a seamless user experience.
- Voice calls
- Video calls
- Text chat
- Works with all popular SIP servers
- Direct calls between clients
- Secure calls using SRTP/ZRTP
- CallKit integration
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ABTO Software's VoIP SIP softphone. Can be used to call sip numbers and landline numbers (if sip provider has this option). Features: voice calls; video calls; text chat (based on SIP MESSAGE request); works with all popual SIP servers, including Asterisk/FreeSwitch; make direct calls between clients without SIP server; allows to use UDP/TCP/TLS protocols for SIP transport; ability to make secure calls using SRTP/ZRTP; supports STUN/ICE; IPv6 support; CallKit - native incoming call UI and system integration of VoIP calls; 2 simultaneous calls; call conferencing; attended transfer.
modulus SoftPhone
This application provides a simple SIP softphone experience, specifically configured to integrate with your modulus account. It allows for easy communication management through a user-friendly interface.
- SIP SoftPhone functionality
- Modulus account integration
- Easy to use interface
- VoIP calling
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Modulus VoIP SoftPhone is an easy to use SIP SoftPhone, configured to work with your modulus account.
Screenshots
Verdict
The clearest difference is rating: modulus SoftPhone at 5.0 against AbtoVoIPClient's 4.5. AbtoVoIPClient's advantage is review sentiment (67% vs 50%) and device support (3 vs 1). On price, ratings volume, update cadence and ads 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.
modulus SoftPhone holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews complicate that: 67% of AbtoVoIPClient's written reviews are positive against 50% of modulus SoftPhone's, so the app with the better star average is not the one people write more warmly about.
AbtoVoIPClient ships an update every 5 months, modulus SoftPhone every 6 months. The most recent releases landed on September 9, 2026 and August 10, 2026 respectively.
| Parameter | AbtoVoIPClient | modulus SoftPhone |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews — better | 50.0% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 5 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 12 MB | 107 MB |
| Age rating | 4+ | 17+ |
| Developer | Sviatoslav Volodymyruvych Litynsky Private Enterpreneur | MODULUS TELECOMS & IT SA |
Customer experience
AbtoVoIPClient
modulus SoftPhone
In-app purchases
AbtoVoIPClient
No in-app purchases
modulus SoftPhone
No in-app purchases
Questions
Is AbtoVoIPClient free?
Is modulus SoftPhone free?
Which has better reviews, AbtoVoIPClient or modulus SoftPhone?
Do AbtoVoIPClient or modulus SoftPhone have ads?
Which is updated more often, AbtoVoIPClient or modulus SoftPhone?
Other comparisons
