# Revisor VMS vs U

The clearest difference is iOS requirement: Revisor VMS at 12.0 against U's 14.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Revisor VMS ships an update every 2 months, U every 3 months. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Revisor VMS | U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/u-smart-ai/id1464413787/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 14.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Free |
| Size | 12 MB | 16 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Revisor Lab](https://appshunter.io/developer/1448747443) | [Shenzhen Rti-Tek Co., Ltd.](https://appshunter.io/developer/1464413786) |

## What reviewers say

### Revisor VMS

[App page](https://appshunter.io/ios/app/revisor-vms/id1448747444)

**Features:** macOS Compatibility

**In-app purchases:** none


### U

[App page](https://appshunter.io/ios/app/u-smart-ai/id1464413787)

Remotely monitor and control your heating and cooling system from anywhere. View and adjust temperature settings, schedules, and system alerts for enhanced comfort and efficiency. Compatible with Rti-Tek Wi-Fi Thermostats.

**Highlights:** Remote monitoring and management, View and change schedules, Adjust heating and cooling settings, Set indoor temperature, View thermostat alerts, Automatic feature upgrades

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Revisor VMS free?

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

### Is U free?

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

### Do Revisor VMS or U have ads?

Neither Revisor VMS nor U shows ads.

### Which is updated more often, Revisor VMS or U?

Revisor VMS ships an update every 2 months, and U every 3 months. Most recently, Revisor VMS was updated on October 11, 2026 and U on October 7, 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.*