Comparison

SIPBlue 2.0 vs OTAC auth

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SIPBlue 2.0

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
Read full description

SIPBlue 2.0 is the business phone that goes wherever you do. Make and receive HD voice and video calls, send and receive SMS and MMS, and message your team, all from one clean, intuitive app on your iPhone. At your desk, on the road, or working from home, your business number and everything attached to it comes with you. BUILT FOR THE WAY YOU WORK • HD voice and video calling with crystal-clear audio • Two-way SMS and MMS from your business number • Instant messaging for quick team collaboration • Complete call history: incoming, outgoing, and missed calls at a glance • Full dialpad, contacts, and recents in a single window SET UP IN SECONDS Scan a QR code and you're signed in. No manual configuration, no support ticket. Prefer to enter your own SIP credentials? That works too. Choose SMS, Voice, or both, and SIPBlue 2.0 configures itself to match. NEVER MISS A CALL Incoming calls and messages ring through with push notifications, even when the app is in the background. Missed something? Your call history shows exactly who called, when, and whether you picked up, so you can get back to them in one tap. FOR MSPs AND IT TEAMS SIPBlue 2.0 is built to deploy at scale. Auto-provisioning and QR-code onboarding let you roll out an entire team without touching a single device, and users are productive within minutes. Connect to your QuestBlue services using the domain, port, and transport settings from your QuBePBX. Fewer setup calls, happier clients. ONE APP, EVERY DEVICE SIPBlue 2.0 is available for iPhone, Mac, Windows, and Android, so your team stays connected on whatever device they're using. Download SIPBlue 2.0 and take your business phone with you.

About

OTAC auth

Features
Read full description

Experience rapid and secure user/device authentication through OTAC's 8-character code. ● Quick and Easy, No Registration: Streamlined authentication without the hassle of sign-up or login processes. Your privacy is paramount; no personal information required. ● Secure Authentication with OTAC Code: Ensure robust security with time-sensitive OTAC codes. Safely access your accounts using a code that expires after a specific duration. ● Manage Multiple Accounts Easily: Effortlessly authenticate multiple accounts using a single OTAC auth app. Register and manage up to 20 accounts securely.

Screenshots

SIPBlue 2.04 screens
OTAC auth4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 8 level
SIPBlue 2.0 versus OTAC auth: the parameters behind the verdict, then further details
ParameterSIPBlue 2.0OTAC auth
PriceFreeFree
Rating4.3 (7 ratings) — better—
Number of ratings7 — better—
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.215.0 — better
Further details — not scored
Size77 MB10 MB
Age rating4+4+
DeveloperQuestBlue Systems, IncswIDch Limited

In-app purchases

None

SIPBlue 2.0

No in-app purchases

None

OTAC auth

No in-app purchases

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.

Other comparisons