# OPTiM Biz vs SDM Dialer

The clearest difference is iOS requirement: SDM Dialer at 10.0 against OPTiM Biz's 15.0. 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.

OPTiM Biz ships an update every 4 months, SDM Dialer every 3 months. The most recent releases landed on September 8, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | OPTiM Biz | SDM Dialer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Size | 18 MB | 3 MB |
| Requires iOS | 15.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OPTiM Corporation](https://appshunter.io/developer/484555009) | [ISB Corporation](https://appshunter.io/developer/318273730) |

## What reviewers say

### OPTiM Biz

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

**In-app purchases:** none


### SDM Dialer

[App page](https://appshunter.io/ios/app/sdm-dialer/id751183889)

**In-app purchases:** none


## Frequently asked questions

### Is OPTiM Biz free?

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

### Is SDM Dialer free?

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

### Do OPTiM Biz or SDM Dialer have ads?

Neither OPTiM Biz nor SDM Dialer shows ads.

### Which is updated more often, OPTiM Biz or SDM Dialer?

OPTiM Biz ships an update every 4 months, and SDM Dialer every 3 months. Most recently, OPTiM Biz was updated on September 8, 2026 and SDM Dialer on May 17, 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.*