Comparison

QuaternionCalc vs Yeastar Linkus Mobile Client

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

Head to head
About

QuaternionCalc

Features
Read full description

Performs quaternion operations. Includes operations are quaternion transpose, quaternion multiplication, forward transformations, reverse transformations, conversion from quaternion to Euler angles and generation a quaternion from two unit vectors.

About

Yeastar Linkus Mobile Client

Transform your mobile phone into an office extension, enabling seamless communication with colleagues and customers. Make and receive calls using your corporate phone network to reduce costs and maintain an in-office experience from anywhere.

Highlights
  • Enterprise VoIP calls over Wi-Fi/mobile data
  • Unified corporate identity with one number reach
  • Flexible ring strategies
  • Corporate directory with status indicators
  • PBX features like Call Transfer and Forwarding
  • Push notifications for incoming calls
Features
Read full description

Linkus is a VoIP Mobile Client coordinated with Yeastar PBXs that makes your iOS mobile phone an office extension and links you and your colleagues and customers anywhere anytime. Make and receive calls through corporate phone network to slash call costs and enhance efficiency with consistent in-office experience. Key Capabilities - Make and receive enterprise VoIP calls over your Wi-Fi or mobile data networks to lower mobile voice charges - One number reach to conceal your personal mobile phone number and ensure unified corporate identity - Set up flexible ring strategy for Linkus and the desktop phone - Select different outbound routes for different destinations (local/long-distance/international, etc.) - Corporate directory integration with lookup and visual status indicator (available/unavailable/busy) - Configurable PBX features including Call Transfer, Call Forwarding, Call Waiting, DND, and Ring Timeout - Support Push Notifications to alert users of incoming calls while conserving energy Main Features Call Forwarding Call History Call Route Selection Call Transfer Call Waiting Contact Management Corporate Directory Do Not Disturb Extension Status Hold & Resume Native Contacts Integration One Touch Recording Outbound Route Selection PUSH Notification Ring Strategy Selection Speed Dial/Favorite Voicemail Specifications iOS Requirement: iOS 11.0 or higher Network: 2G/3G/4G or Wi-Fi Protocol: SIP FRC2361 Codec: iLBC/u-law/a-law/G722/G729 Network Protocol: TCP/IP/UDP, RTP/SRTP/RTCP, HTTP/HTTPS DTMF: Inband, RFC4733 (RFC2833), Info Important: This application is integrated with Yeastar PBXs; your administrator must provide you with identity information for you to start using.

Screenshots

QuaternionCalc1 screens
Yeastar Linkus Mobile Client4 screens

Verdict

The call

The clearest difference is price: Yeastar Linkus Mobile Client at Free against QuaternionCalc's $2.99. Yeastar Linkus Mobile Client also leads on update cadence (every 4 weeks vs every 15 months) and iOS requirement (15 vs 18.0). On ads, in-app purchases and device support 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

Yeastar Linkus Mobile Client is free to download; QuaternionCalc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

QuaternionCalc ships an update every 15 months, Yeastar Linkus Mobile Client every 4 weeks. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

Scorecard3 real differences · 7 level
QuaternionCalc versus Yeastar Linkus Mobile Client: the parameters behind the verdict, then further details
ParameterQuaternionCalcYeastar Linkus Mobile Client
Price$2.99Free — better
Rating—3.8 (34 ratings) — better
Positive reviews—35.4% of reviews
Number of ratings—34 — better
Update frequencyEvery 15 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015 — better
Further details — not scored
Size2 MB71 MB
Age rating4+4+
DeveloperPrinceton Satellite SystemsYeastar

In-app purchases

None

QuaternionCalc

No in-app purchases

None

Yeastar Linkus Mobile Client

No in-app purchases

Questions

Is QuaternionCalc free?
QuaternionCalc costs $2.99, with no in-app purchases.
Is Yeastar Linkus Mobile Client free?
Yeastar Linkus Mobile Client is free to download, with no in-app purchases.
Do QuaternionCalc or Yeastar Linkus Mobile Client have ads?
Neither QuaternionCalc nor Yeastar Linkus Mobile Client shows ads.
Which is updated more often, QuaternionCalc or Yeastar Linkus Mobile Client?
QuaternionCalc ships an update every 15 months, and Yeastar Linkus Mobile Client every 4 weeks. Most recently, QuaternionCalc was updated on November 6, 2026 and Yeastar Linkus Mobile Client on November 2, 2026.

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