OPTiM Biz vs Smart PBX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OPTiM Biz
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.
- Remote device management
- Send notification messages
- GPS location tracking
- Supports iPhone, iPad, iPod
- Japanese and English language support
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OPTiM Biz Agent is the agent application Device Management Service that OPTiM corporation supplies. Its service is named "OPTiM Biz". OPTiM Biz Agent does not work standalone. This software should be used with service of "OPTiM Biz". If you apply "OPTiM Biz" service, then you can do the following action. Send notification message to your company's iPad and iPhone. Get location information by using GPS function. ※Japanese, English are supported.
Smart PBX
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.
- VoIP communication on smartphones
- Internal and external extension calls
- PBX management (call forwarding, voicemail)
- FMC and single number reach
- Device and multi-carrier flexibility
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【注意事項】 「Smart PBX」は法人向けサービスであるため、ご利用頂くにはNTTドコモビジネスの営業担当経由のお申込みが必要になります。 【概要】 「Smart PBX」は、お客様がお使いのスマートフォン上で、VoIP通信をご利用いただけるサービスです。本サービスをご利用いただくことで、拠点内だけでなく、拠点間や、外出先とも内線番号での通話が可能となります。 また、内線番号、代表グループ、転送、留守番電話等の設定をお客様自身で変更可能とし、ワンストップでPBX機能の管理ができるサービスです。 特徴①：FMCに対応した内線通話機能及びPBX機能をご利用いただけます。 特徴②：スマホ、PCなど多様なデバイスで利用可能となっております。(デバイスフリー) 特徴③：モバイルもマルチキャリアに対応しております。(キャリアフリー) 特徴④：既存のPBXを活用した構成にすることも可能となっております。 【主な機能】 ・内線通話(発信・着信) ・FMC機能(シングルナンバーリーチ機能) ・PBX機能(代表機能、転送機能、留守番電話機能)
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | OPTiM Biz | Smart PBX |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 33.3% of reviews — better | 11.8% of reviews |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 18 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | OPTiM Corporation | NTT DOCOMO BUSINESS, INC. |
Customer experience
OPTiM Biz
Smart PBX
In-app purchases
OPTiM Biz
No in-app purchases
Smart PBX
No in-app purchases
Questions
Is OPTiM Biz free?
Is Smart PBX free?
Do OPTiM Biz or Smart PBX have ads?
Which is updated more often, OPTiM Biz or Smart PBX?
Other comparisons
