# Surveillance365 vs UnitFlowPro

The clearest difference is price: Surveillance365 at Free against UnitFlowPro's $1.99. Surveillance365 also leads on ads (none vs shown). UnitFlowPro's advantage is update cadence (every 5 days vs every 6 weeks). On in-app purchases, device support and iOS requirement there is nothing between them.

Surveillance365 is free to download; UnitFlowPro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Surveillance365 ships an update every 6 weeks, UnitFlowPro every 5 days. The most recent releases landed on October 10, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Surveillance365 | UnitFlowPro |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unitflowpro/id6767599503/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 161 MB | 3 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Synology Inc.](https://appshunter.io/developer/321493109) | [James Roche](https://appshunter.io/developer/1896491450) |

## What reviewers say

### Surveillance365

[App page](https://appshunter.io/ios/app/surveillance365/id6480110632)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### UnitFlowPro

[App page](https://appshunter.io/ios/app/unitflowpro/id6767599503)

Instantly convert units across numerous categories with real-time updates as you type. Features a clean, dark interface with color-coded units for easy identification. Handles all number types seamlessly.

**Highlights:** Real-time unit conversions, 15+ conversion categories, Color-coded unit design, Smart number handling, Ad-free option via one-time purchase

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Surveillance365 free?

Surveillance365 is free to download, with no in-app purchases.

### Is UnitFlowPro free?

UnitFlowPro costs $1.99, with no in-app purchases.

### Do Surveillance365 or UnitFlowPro have ads?

UnitFlowPro shows ads; Surveillance365 does not.

### Which is updated more often, Surveillance365 or UnitFlowPro?

Surveillance365 ships an update every 6 weeks, and UnitFlowPro every 5 days. Most recently, Surveillance365 was updated on October 10, 2026 and UnitFlowPro on October 14, 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.*