# Predor vs Sis Work

The clearest difference is update cadence: Sis Work at every 6 weeks against Predor's every 29 months. Predor's advantage is iOS requirement (10.0 vs 13.0). 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.

Predor ships an update every 29 months, Sis Work every 6 weeks. The most recent releases landed on September 14, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Predor | Sis Work |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 6 weeks** |
| Size | 13 MB | 106 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Leviathan Solutions Elektronikai es Fejleszto Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/1473961447) | [ASSA ABLOY Opening Solutions Hungary Kft](https://appshunter.io/developer/1102976407) |

## What reviewers say

### Predor

[App page](https://appshunter.io/ios/app/predor/id1473961448)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sis Work

[App page](https://appshunter.io/ios/app/sis-work/id6450505803)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Predor free?

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

### Is Sis Work free?

Sis Work is free to download, with no in-app purchases.

### Do Predor or Sis Work have ads?

Neither Predor nor Sis Work shows ads.

### Which is updated more often, Predor or Sis Work?

Predor ships an update every 29 months, and Sis Work every 6 weeks. Most recently, Predor was updated on September 14, 2026 and Sis Work on June 1, 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.*