# Raysync vs Keidulator

The clearest difference is update cadence: Keidulator at every 5 weeks against Raysync's every 3 months. Raysync's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.4). On price, 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.

Raysync ships an update every 3 months, Keidulator every 5 weeks. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Raysync | Keidulator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Size | 43 MB | 1 MB |
| Requires iOS | **15.6** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [RAYWING PTE.LTD.](https://appshunter.io/developer/1723020193) | [Alexander Guretzki](https://appshunter.io/developer/1442073696) |

## What reviewers say

### Raysync

[App page](https://appshunter.io/ios/app/raysync/id1572930350)

**Features:** macOS Compatibility

**In-app purchases:** none


### Keidulator

[App page](https://appshunter.io/ios/app/keidulator-vat-calc/id6480166328)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Raysync free?

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

### Is Keidulator free?

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

### Do Raysync or Keidulator have ads?

Neither Raysync nor Keidulator shows ads.

### Which is updated more often, Raysync or Keidulator?

Raysync ships an update every 3 months, and Keidulator every 5 weeks. Most recently, Raysync was updated on November 7, 2026 and Keidulator on November 8, 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.*