# STYM vs PreventivOk

The clearest difference is update cadence: STYM at every 4 days against PreventivOk's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. STYM sells 3 in-app purchases, starting at $12.99 per month and PreventivOk sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

STYM ships an update every 4 days, PreventivOk fortnightly. The most recent releases landed on October 25, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | STYM | PreventivOk |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Size | 114 MB | 45 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Geoplan s.r.l.](https://appshunter.io/developer/1803191961) | [Antonio Augello](https://appshunter.io/developer/1844412810) |

## What reviewers say

### STYM

[App page](https://appshunter.io/ios/app/stym-smart-estimate-maker/id6749853242)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $12.99 | per month |
| Premium Annual | $89.99 | per year |
| Premium Annual | $89.99 | per year |


### PreventivOk

[App page](https://appshunter.io/ios/app/preventivok/id6753686989)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced | $2.99 | per month |
| Premium | $4.99 | per month |


## Frequently asked questions

### Is STYM free?

STYM is free to download, with in-app purchases available.

### Is PreventivOk free?

PreventivOk is free to download, with in-app purchases available.

### Do STYM or PreventivOk have ads?

Neither STYM nor PreventivOk shows ads.

### Which is updated more often, STYM or PreventivOk?

STYM ships an update every 4 days, and PreventivOk fortnightly. Most recently, STYM was updated on October 25, 2026 and PreventivOk on October 12, 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.*