# SIPBlue 2.0 vs OTAC auth

The clearest difference is iOS requirement: OTAC auth at 15.0 against SIPBlue 2.0's 18.2. On price, update cadence, ads and in-app purchases there is nothing between them.

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

SIPBlue 2.0 ships an update every 2 months, OTAC auth every 6 weeks. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SIPBlue 2.0 | OTAC auth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (7 ratings)](https://appshunter.io/ios/app/sipblue-20/id6466404244/reviews)** | — |
| Number of ratings | **7** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 77 MB | 10 MB |
| Requires iOS | 18.2 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [QuestBlue Systems, Inc](https://appshunter.io/developer/1518813567) | [swIDch Limited](https://appshunter.io/developer/1723421198) |

## What reviewers say

### SIPBlue 2.0

[App page](https://appshunter.io/ios/app/sipblue-20/id6466404244)

This communication app offers secure, high-definition voice and video calls, instant messaging, and SMS/MMS services. It features end-to-end encryption, call history, and an intuitive interface for seamless connectivity anywhere, anytime.

**Highlights:** HD voice and video calls, Instant messaging, SMS/MMS services, End-to-end encryption, Call history, QR code login, Auto provisioning

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

**In-app purchases:** none


### OTAC auth

[App page](https://appshunter.io/ios/app/otac-auth/id6475137518)

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

**In-app purchases:** none


## Frequently asked questions

### Is SIPBlue 2.0 free?

SIPBlue 2.0 is free to download, with no in-app purchases.

### Is OTAC auth free?

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

### Do SIPBlue 2.0 or OTAC auth have ads?

Neither SIPBlue 2.0 nor OTAC auth shows ads.

### Which is updated more often, SIPBlue 2.0 or OTAC auth?

SIPBlue 2.0 ships an update every 2 months, and OTAC auth every 6 weeks. Most recently, SIPBlue 2.0 was updated on October 24, 2026 and OTAC auth on October 5, 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.*