Opus VO vs Calvis
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Opus VO
Manage your company portal and account on the go. Send SMS and make calls using your company's dedicated phone number as your outbound caller ID. This app functions as your corporate phone, whether you are domestic or international.
- Company portal access
- Account management
- Send SMS
- Make calls
- Custom outbound caller ID
- Corporate phone functionality
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Opus VO allows you to access your company portal, manage your account, send SMS and make calls from your smart phone showing your chosen company phone number as the outbound caller ID. This feature will act as your Corporate Phone if you reside both domestically or internationally. SMS and Callout Require a valid Opus VO subscription.
Calvis
Easily book and manage security services. For security personnel, this platform simplifies shift pickup and ensures prompt payment.
- Book security services
- Manage security bookings
- Pick up security shifts
- Seamless payment for guards
- Future of security management
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Book and manage security with ease. For guards, use Calvis to pick up shifts and get paid seamlessly.
Screenshots
Verdict
The clearest difference is rating: Calvis at 4.7 against Opus VO's 2.9. Calvis also leads on update cadence (weekly vs every 3 weeks) and review sentiment (63% vs 54%). Opus VO's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.2). On price, ratings volume, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Calvis holds the better App Store score, 4.7 against 2.9. Both are backed by a comparable volume of ratings — 18 and 13 respectively. Written reviews point the same way: 54% of Opus VO's written reviews are positive against 63% of Calvis's.
Opus VO ships an update every 3 weeks, Calvis weekly. The most recent releases landed on October 1, 2026 and October 11, 2026 respectively.
| Parameter | Opus VO | Calvis |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (18 ratings) | 4.7 (13 ratings) — better |
| Positive reviews | 53.8% of reviews | 62.5% of reviews — better |
| Number of ratings | 18 — better | 13 |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 56 MB | 48 MB |
| Age rating | 17+ | 4+ |
| Developer | OPUS VIRTUAL OFFICES, LLC | Calvis |
Customer experience
Opus VO
Calvis
In-app purchases
Opus VO
No in-app purchases
Calvis
No in-app purchases
