# PI vs CAL Innov

PI and CAL Innov are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | PI | CAL Innov |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 14 MB | 30 MB |
| Requires iOS | 15.1 | **15** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Refuah Solutions LTD](https://appshunter.io/developer/1473298751) | [Centre Antoine LAcassagne](https://appshunter.io/developer/1337072265) |

## What reviewers say

### PI

[App page](https://appshunter.io/ios/app/pi-support/id1663142410)

**Features:** macOS Compatibility

**In-app purchases:** none


### CAL Innov

[App page](https://appshunter.io/ios/app/cal-innov/id1667512546)

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

**In-app purchases:** none


## Frequently asked questions

### Is PI free?

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

### Is CAL Innov free?

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

### Do PI or CAL Innov have ads?

Neither PI nor CAL Innov shows ads.

### Which is updated more often, PI or CAL Innov?

PI ships an update every 3 weeks, and CAL Innov every 3 weeks. Most recently, PI was updated on October 4, 2026 and CAL Innov on October 7, 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.*