AbtoVoIPClient vs OperrTel
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.
OperrTel
This business phone service app provides full mobility for its customers. Manage voice calls, instant messaging, and presence services from your mobile device, effectively carrying your office in your pocket.
- Mobile business phone service
- Voice calls
- Instant messaging
- Presence services
- Office mobility
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The Operrtel App is a business phone service app that enables complete mobility for Operrtel customers. Stay connected when you're away from your office phone, or replace your desk phone altogether when you utilize voice, instant messaging, and presence services from your mobile device. It's like carrying your office in the palm of your hand. Please check our Terms & Conditions: https://www.operrtel.com/terms-of-service.html Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: AbtoVoIPClient at 67% against OperrTel's 0%. AbtoVoIPClient also leads on in-app purchases (none vs 3). OperrTel's advantage is rating (4.4 vs 3.7) and update cadence (weekly vs every 5 months). On price, ratings volume, ads 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. OperrTel sells 3 in-app purchases, starting at $0.49 per month. AbtoVoIPClient asks for nothing beyond the download.
OperrTel holds the better App Store score, 4.4 against 3.7. Both are backed by a comparable volume of ratings — 3 and 7 respectively. Written reviews complicate that: 67% of AbtoVoIPClient's written reviews are positive against 0% of OperrTel'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, OperrTel weekly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | AbtoVoIPClient | OperrTel |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.4 (7 ratings) — better |
| Positive reviews | 66.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 | 7 — better |
| Update frequency | Every 5 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 135 MB |
| Age rating | 4+ | 4+ |
| Developer | Sviatoslav Volodymyruvych Litynsky Private Enterpreneur | Operr Technologies, Inc. |
Customer experience
AbtoVoIPClient
OperrTel
In-app purchases
AbtoVoIPClient
No in-app purchases
OperrTel
- Monthly Fee$0.491 Month
- Half Yearly Fee$0.996 Months
- Yearly Fee$2.491 Year
