# frSIP Mobile (Legacy Support) vs Skylar

The clearest difference is rating: Skylar at 4.0 against frSIP Mobile (Legacy Support)'s 3.0. Skylar also leads on ratings volume (5 vs 1). frSIP Mobile (Legacy Support)'s advantage is in-app purchases (none vs 2) and update cadence (monthly vs every 4 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Skylar sells 2 one-off in-app purchases. frSIP Mobile (Legacy Support) asks for nothing beyond the download.

Skylar holds the better App Store score, 4.0 against 3.0. That said, the two scores are not equally well evidenced: Skylar has 5 ratings behind it against 1, so its average is the more settled of the two.

frSIP Mobile (Legacy Support) ships an update monthly, Skylar every 4 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | frSIP Mobile (Legacy Support) | Skylar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/frsip-mobile-legacy-support/id483109346/reviews) | **[4.0 (5 ratings)](https://appshunter.io/ios/app/skylar/id835813069/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | Free |
| Size | 91 MB | 54 MB |
| Requires iOS | **7.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Deltapath, Inc.](https://appshunter.io/developer/1136982704) | [BroTecs Technologies, LLC.](https://appshunter.io/developer/835813072) |

## What reviewers say

### frSIP Mobile (Legacy Support)

[App page](https://appshunter.io/ios/app/frsip-mobile-legacy-support/id483109346)

This application allows users to make and receive calls on their office phone line directly from their mobile device. It enables enterprise mobility by pairing your phone with your office extension, allowing you to stay connected anywhere with Wi-Fi or cellular data. The app can run in the background and will ring when your office phone rings.

**Highlights:** Make and receive office calls on mobile, Pair mobile with office extension, Background call ringing, Use office line for outgoing calls, Enterprise mobility

**Features:** macOS Compatibility

**In-app purchases:** none


### Skylar

[App page](https://appshunter.io/ios/app/skylar/id835813069)

This secure, standard-based mobile VoIP softphone offers high-quality calls over various networks. It features advanced call management, multi-account support, and intelligent network sensing for a smooth user experience.

**Highlights:** Advanced security settings, Intelligent network quality sensing, HD Wideband audio, Multi-tasking support, Multiple SIP account support, Call history and management, XMPP Messaging support

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| G.729 Codec | $2.99 | one-time |
| Full Version | $4.99 | one-time |


## Frequently asked questions

### Is frSIP Mobile (Legacy Support) free?

frSIP Mobile (Legacy Support) is free to download, with no in-app purchases.

### Is Skylar free?

Skylar is free to download, with in-app purchases available.

### Which has better reviews, frSIP Mobile (Legacy Support) or Skylar?

Skylar is rated higher. frSIP Mobile (Legacy Support) averages 3.0 out of 5 from 1 ratings, while Skylar averages 4.0 from 5 ratings.

### Do frSIP Mobile (Legacy Support) or Skylar have ads?

Neither frSIP Mobile (Legacy Support) nor Skylar shows ads.

### Which is updated more often, frSIP Mobile (Legacy Support) or Skylar?

frSIP Mobile (Legacy Support) ships an update monthly, and Skylar every 4 months. Most recently, frSIP Mobile (Legacy Support) was updated on November 1, 2026 and Skylar on November 1, 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.*