# FusionSIP vs Infinity

The clearest difference is update cadence: FusionSIP at every 2 weeks against Infinity's every 29 months. FusionSIP also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FusionSIP ships an update every 2 weeks, Infinity every 29 months. Both last shipped on September 15, 2026.

## The numbers

| Metric | FusionSIP | Infinity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/infinity-1st-call/id6451249868/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 29 months |
| Monetization | — | Free |
| Size | 11 MB | 121 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [EDNT GmbH](https://appshunter.io/developer/975507681) | [1st Call](https://appshunter.io/developer/1697299507) |

## What reviewers say

### FusionSIP

[App page](https://appshunter.io/ios/app/fusionsip/id1586959709)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Infinity

[App page](https://appshunter.io/ios/app/infinity-1st-call/id6451249868)

This app provides Unified Communications by extending VoIP functionality to mobile devices. Users can maintain a consistent identity for calls, manage contacts, voicemail, and call history from one place. It also allows for efficient communication through answering rules, greetings, and presence management.

**Highlights:** Unified Communications solution, VoIP functionality on mobile, Maintain same identity across devices, Contact management, Voicemail and call history, Answering rules and presence management

**Features:** macOS Compatibility, Siri integration, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FusionSIP free?

FusionSIP is free to download, with no in-app purchases.

### Is Infinity free?

Infinity is free to download, with no in-app purchases.

### Do FusionSIP or Infinity have ads?

Neither FusionSIP nor Infinity shows ads.

### Which is updated more often, FusionSIP or Infinity?

FusionSIP ships an update every 2 weeks, and Infinity every 29 months. Most recently, FusionSIP was updated on September 15, 2026 and Infinity on September 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*