# SIdP POWERup vs Petra lite

The clearest difference is update cadence: SIdP POWERup at every 4 days against Petra lite's every 48 months. Petra lite's advantage is iOS requirement (12.4 vs 18.0). 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.

SIdP POWERup ships an update every 4 days, Petra lite every 48 months. The most recent releases landed on June 10, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | SIdP POWERup | Petra lite |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 48 months |
| Size | 162 MB | 7 MB |
| Requires iOS | 18.0 | **12.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [SOCIETA' ITALIANA DI PARODONTOLOGIA](https://appshunter.io/developer/613689964) | [Carlo Narcisi](https://appshunter.io/developer/1584611393) |

## What reviewers say

### SIdP POWERup

[App page](https://appshunter.io/ios/app/sidp-powerup/id1456462409)

**Features:** macOS Compatibility

**In-app purchases:** none


### Petra lite

[App page](https://appshunter.io/ios/app/petra-lite/id1597755936)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SIdP POWERup free?

SIdP POWERup is free to download, with no in-app purchases.

### Is Petra lite free?

Petra lite is free to download, with no in-app purchases.

### Do SIdP POWERup or Petra lite have ads?

Neither SIdP POWERup nor Petra lite shows ads.

### Which is updated more often, SIdP POWERup or Petra lite?

SIdP POWERup ships an update every 4 days, and Petra lite every 48 months. Most recently, SIdP POWERup was updated on June 10, 2026 and Petra lite on September 10, 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.*