# CAL_ vs LRTK

The clearest difference is iOS requirement: CAL_ at 12.0 against LRTK's 17.0. On price, update cadence, 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.

CAL_ ships an update every 4 days, LRTK weekly. The most recent releases landed on September 17, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | CAL_ | LRTK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Size | 9 MB | 730 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SQUAIR Inc.](https://appshunter.io/developer/1162347955) | [レフィクシア株式会社](https://appshunter.io/developer/1599841370) |

## What reviewers say

### CAL_

[App page](https://appshunter.io/ios/app/cal-logging-calculator/id1162347956)

**Features:** macOS Compatibility

**In-app purchases:** none


### LRTK

[App page](https://appshunter.io/ios/app/lrtk/id1641216786)

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

**In-app purchases:** none


## Frequently asked questions

### Is CAL_ free?

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

### Is LRTK free?

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

### Do CAL_ or LRTK have ads?

Neither CAL_ nor LRTK shows ads.

### Which is updated more often, CAL_ or LRTK?

CAL_ ships an update every 4 days, and LRTK weekly. Most recently, CAL_ was updated on September 17, 2026 and LRTK on September 23, 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.*