# OPTiM Biz vs Smart PBX

The clearest difference is review sentiment: OPTiM Biz at 33% against Smart PBX's 12%. 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.

OPTiM Biz ships an update every 4 months, Smart PBX every 3 months. The most recent releases landed on October 23, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | OPTiM Biz | Smart PBX |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **33.3% of reviews** | 11.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 18 MB | 30 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OPTiM Corporation](https://appshunter.io/developer/484555009) | [NTT DOCOMO BUSINESS, INC.](https://appshunter.io/developer/291824371) |

## What reviewers say

### OPTiM Biz

[App page](https://appshunter.io/ios/app/optim-biz/id484555006)

This business application allows companies to remotely manage their iOS devices. It enables sending notifications and tracking device locations via GPS. The service requires a subscription to "OPTiM Biz" to function.

**Highlights:** Remote device management, Send notification messages, GPS location tracking, Supports iPhone, iPad, iPod, Japanese and English language support

**Features:** Vision Pro support

**In-app purchases:** none


### Smart PBX

[App page](https://appshunter.io/ios/app/smart-pbx/id781294337)

This business service enables VoIP calls and PBX functionalities on smartphones. It allows for internal and external calls using extension numbers across different locations and devices. Users can manage features like call forwarding and voicemail independently.

**Highlights:** VoIP communication on smartphones, Internal and external extension calls, PBX management (call forwarding, voicemail), FMC and single number reach, Device and multi-carrier flexibility

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OPTiM Biz free?

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

### Is Smart PBX free?

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

### Do OPTiM Biz or Smart PBX have ads?

Neither OPTiM Biz nor Smart PBX shows ads.

### Which is updated more often, OPTiM Biz or Smart PBX?

OPTiM Biz ships an update every 4 months, and Smart PBX every 3 months. Most recently, OPTiM Biz was updated on October 23, 2026 and Smart PBX on October 19, 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.*