QuaternionCalc vs Yeastar Linkus Mobile Client
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QuaternionCalc
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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.
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.
- 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
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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
Verdict
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
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.
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.
| Parameter | QuaternionCalc | Yeastar Linkus Mobile Client |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 3.8 (34 ratings) — better |
| Positive reviews | — | 35.4% of reviews |
| Number of ratings | — | 34 — better |
| Update frequency | Every 15 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15 — better |
| Further details — not scored | ||
| Size | 2 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Princeton Satellite Systems | Yeastar |
In-app purchases
QuaternionCalc
No in-app purchases
Yeastar Linkus Mobile Client
No in-app purchases
Questions
Is QuaternionCalc free?
Is Yeastar Linkus Mobile Client free?
Do QuaternionCalc or Yeastar Linkus Mobile Client have ads?
Which is updated more often, QuaternionCalc or Yeastar Linkus Mobile Client?
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