250+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our osis sip list covers 250+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 3.8★ (60) | No | No | May 2026 |
| 2 |  | Free | — | No | No | May 2026 |
| 3 |  | $1.99 | 3.0★ (4) | No | No | Aug 2026 |
| 4 |  | Free | — | No | No | May 2026 |
| 5 |  | Free | — | No | No | May 2026 |
| 6 |  | Free | — | No | No | Jul 2026 |
| 7 |  | Free | 4.0★ (12) | No | No | May 2026 |
| 8 |  | Free | — | No | No | May 2026 |
Manage your academic life with ease. This app offers a user-friendly interface for fee payments, course information, registration, and real-time updates. Track your progress and stay informed about important academic events.
This powerful SIP softphone offers a flexible and robust calling experience with superb audio quality. It allows you to make calls over various networks and integrates with your existing contacts and SIP solutions, freeing you from traditional desk phones.
This communication app allows users to make free calls, send texts, and share files with other users on the platform. It supports push notifications and high-definition voice and video for enhanced communication.
Analyze current investments or plan future ones with this tool. It calculates the future value of Systematic Investment Plan (SIP) payments and helps determine monthly investment amounts needed to reach financial goals. Useful for planning long-term purchases like a car or house.
This app is a full-featured SIP softphone that works with any SIP server. It offers on-device AI for real-time call transcription and analysis, with advanced security and network features. It is not a standalone phone service and requires a SIP account from your provider.
This application functions as a SIP intercom softphone, enabling users to make and receive audio and video calls from IP intercom stations on their mobile devices. It allows for communication and remote door opening, working through Wi-Fi and cellular data networks.
This app provides high-definition voice and video calls, plus instant messaging, for users of a specific hosted PBX platform. It offers secure calling with TLS encryption and efficient low-bandwidth usage. Setup is simplified through QR code provisioning.
This open-source application provides free audio and video calls, as well as text messaging, over the internet. It allows users to stay reachable at all times via WiFi or mobile data, even when the app is closed. Enjoy secure communication and the ability to connect with traditional phone lines.
This application facilitates VOIP audio and video communication using the SIP protocol. It functions as an intercom system for seamless voice and video calls.
A professional SIP softphone client for developers and technical teams. It allows seamless connection to SIP systems across mobile and computer devices for account configuration, call control, and diagnostics.
This mobile dialer app offers high-quality VoIP calls at reduced rates. It features a smart interface, real-time SIP status, and seamless address book integration. Optimized for low bandwidth, it ensures efficient communication on Apple devices.
This SIP client connects to various telephone systems, offering call management features like hold, mute, and loudspeaker. It includes a phone book, call history, and customizable codecs for efficient communication on the go.