# iSIR vs CERULEO

The clearest difference is update cadence: CERULEO at weekly against iSIR's every 6 months. 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.

iSIR ships an update every 6 months, CERULEO weekly. The most recent releases landed on October 16, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | iSIR | CERULEO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Size | 23 MB | 133 MB |
| Requires iOS | 13.0 | **12.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Expomeeting](https://appshunter.io/developer/1498921317) | [Antonio Maria Russo](https://appshunter.io/developer/1625169466) |

## What reviewers say

### iSIR

[App page](https://appshunter.io/ios/app/isir/id6738472805)

**Features:** macOS Compatibility

**In-app purchases:** none


### CERULEO

[App page](https://appshunter.io/ios/app/ceruleo/id6747738754)

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

**In-app purchases:** none


## Frequently asked questions

### Is iSIR free?

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

### Is CERULEO free?

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

### Do iSIR or CERULEO have ads?

Neither iSIR nor CERULEO shows ads.

### Which is updated more often, iSIR or CERULEO?

iSIR ships an update every 6 months, and CERULEO weekly. Most recently, iSIR was updated on October 16, 2026 and CERULEO on October 6, 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.*