# Control NOVA vs Caldy

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.

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.

## The numbers

| Metric | Control NOVA | Caldy |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/control-nova/id1140226202/reviews)** | [2.0 (2 ratings)](https://appshunter.io/ios/app/caldy-visual-calculator/id1577075538/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 30.3% of reviews | **57.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | **Free** | Paid |
| Size | 37 MB | 1 MB |
| Requires iOS | **10.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TIRAS-12, TOV](https://appshunter.io/developer/1140226201) | [Alventir Ltd](https://appshunter.io/developer/1527058758) |

## What reviewers say

### Control NOVA

[App page](https://appshunter.io/ios/app/control-nova/id1140226202)

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.

**Highlights:** Arming/disarming security system, View zone status, Control automatics (heating, lighting), View event log, Instant PUSH notifications, Support for 16 objects

**In-app purchases:** none


### Caldy

[App page](https://appshunter.io/ios/app/caldy-visual-calculator/id1577075538)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is Control NOVA free?

Control NOVA is free to download, with no in-app purchases.

### Is Caldy free?

Caldy costs $2.99, with no in-app purchases.

### Which has better reviews, Control NOVA or Caldy?

Control NOVA is rated higher. Control NOVA averages 3.7 out of 5 from 3 ratings, while Caldy averages 2.0 from 2 ratings.

### Do Control NOVA or Caldy have ads?

Neither Control NOVA nor Caldy shows ads.

### Which is updated more often, Control NOVA or Caldy?

Control NOVA ships an update every 5 months, and Caldy fortnightly. Most recently, Control NOVA was updated on October 16, 2026 and Caldy on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*