# OJ Air Service tool vs Belimo Assistant 2

The clearest difference is update cadence: Belimo Assistant 2 at every 5 weeks against OJ Air Service tool's every 38 months. OJ Air Service tool's advantage is iOS requirement (10.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

OJ Air Service tool ships an update every 38 months, Belimo Assistant 2 every 5 weeks. The most recent releases landed on October 26, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | OJ Air Service tool | Belimo Assistant 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.4 (10 ratings)](https://appshunter.io/ios/app/belimo-assistant-2/id6475810004/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 5 weeks** |
| Monetization | — | Free |
| Size | 53 MB | 125 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [OJ ELECTRONICS AS](https://appshunter.io/developer/1326069502) | [BELIMO Automation AG](https://appshunter.io/developer/1149281298) |

## What reviewers say

### OJ Air Service tool

[App page](https://appshunter.io/ios/app/oj-air-service-tool/id1374343463)

**Features:** macOS Compatibility

**In-app purchases:** none


### Belimo Assistant 2

[App page](https://appshunter.io/ios/app/belimo-assistant-2/id6475810004)

This app allows for the setup, operation, and troubleshooting of Belimo devices like actuators and valves using a smartphone or tablet. It offers features for checking settings, monitoring device status, and generating reports.

**Highlights:** Device setting parameter modification, Display identification data, MP-Bus, BACnet, Modbus, TCP/IP addressing, Guided parameter setup, Copy/Paste device configurations, Live trending and local override, Device health and operation monitoring, Digital report generation

**In-app purchases:** none


## Frequently asked questions

### Is OJ Air Service tool free?

OJ Air Service tool is free to download, with no in-app purchases.

### Is Belimo Assistant 2 free?

Belimo Assistant 2 is free to download, with no in-app purchases.

### Do OJ Air Service tool or Belimo Assistant 2 have ads?

Neither OJ Air Service tool nor Belimo Assistant 2 shows ads.

### Which is updated more often, OJ Air Service tool or Belimo Assistant 2?

OJ Air Service tool ships an update every 38 months, and Belimo Assistant 2 every 5 weeks. Most recently, OJ Air Service tool was updated on October 26, 2026 and Belimo Assistant 2 on November 5, 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.*