Control NOVA vs Caldy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Control NOVA
Manage your Orion NOVA security system remotely via your smartphone. Arm/disarm, check zone status, control automatics, and view event logs. Receive instant PUSH notifications for alarms and faults.
- Arming/disarming security system
- View zone status
- Control automatics (heating, lighting)
- View event log
- Instant PUSH notifications
- Support for 16 objects
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Application for remote control of the security system Orion NOVA. Wherever you are, everything you need is a connection of your smartphone with the Internet. Control NOVA gives you complete remote access to your security system: - Arming/disarming of the security system. - View the status of zones. - Control of automatics - heating, lighting, water supply, and more. - View the event log by displaying detailed event information. - Instant reception of information from the security system in the form of PUSH messages (alarms, faults, arming/disarming, etc.). Each session of communication with your security system is protected by an access code or a fingerprint scan. The exchange of information takes place in an encrypted form. The application supports simultaneous operation with 16 objects. This may be your apartment, house, office, garage and more.
Caldy
This app offers a visual approach to calculations, linking values with arrows and allowing for dynamic editing of expressions. It supports organizing calculations into documents, plotting expressions, and includes various math functions. Ideal for complex calculations beyond basic arithmetic.
- Visual calculation linking
- Editable expressions with automatic updates
- Document-based organization
- Plotting and zooming capabilities
- Trigonometry and math functions
- Dark mode support
- Export sheets as images
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When you need more than a basic calculator, but do not want a spreadsheet. Caldy is a visual calculator: linked values are clearly shown with connecting arrows. The history is right in front of you. Caldy is a dynamic calculator: any number or operation can be changed and the linked expressions are updated automatically. Numbers can have labels, making the expressions easier to read. Results can be dragged and dropped on placeholders to connect expressions. Sub-expressions can be extracted to structure complex calculations. Sub-expressions can be extracted to structure complex calculations. Caldy percentage increase function, very handy to calculate tips or tax such as VAT. Caldy can plot expressions. Plots are zoomable and dynamic as well. Pinch on the plot to zoom in or out. Caldy is document-based. You can organize your calculation sheets like files, on your device or even on iCloud. Caldy has math functions, trigonometry functions. Caldy supports dark mode. All Clear button to clear the sheet. Undo and redo buttons. Cursor move buttons (left and right). Export to share the sheet as an image. A new intuitive calculator. - Familiar interface - Edit expressions anywhere anytime, results are updated automatically - Multiple sheets - Plots, pinch to change X range - Dark mode - Trigonometry functions, exponential, logarithm, percentage increase, absolute function - Add labels to numbers - Swap operands, extract subexpressions, move expressions
Screenshots
Verdict
The clearest difference is price: Control NOVA at Free against Caldy's $2.99. Control NOVA also leads on rating (3.7 vs 2.0) and iOS requirement (10.0 vs 17.6). Caldy's advantage is update cadence (fortnightly vs every 5 months) and review sentiment (57% vs 30%). On ratings volume, 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
Control NOVA is free to download; Caldy costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Control NOVA holds the better App Store score, 3.7 against 2.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews complicate that: 30% of Control NOVA's written reviews are positive against 57% of Caldy's, so the app with the better star average is not the one people write more warmly about.
Control NOVA ships an update every 5 months, Caldy fortnightly. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.
| Parameter | Control NOVA | Caldy |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 3.7 (3 ratings) — better | 2.0 (2 ratings) |
| Positive reviews | 30.3% of reviews | 57.1% of reviews — better |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 5 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 10.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 37 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | TIRAS-12, TOV | Alventir Ltd |
Customer experience
Control NOVA
Caldy
In-app purchases
Control NOVA
No in-app purchases
Caldy
No in-app purchases
