# LECO Cornerstone vs Calendar Clock

The clearest difference is price: LECO Cornerstone at Free against Calendar Clock's $0.99. LECO Cornerstone also leads on update cadence (every 5 weeks vs every 41 months) and iOS requirement (8.0 vs 26.5). On ads, in-app purchases and device support there is nothing between them.

LECO Cornerstone is free to download; Calendar Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

LECO Cornerstone ships an update every 5 weeks, Calendar Clock every 41 months. The most recent releases landed on June 8, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | LECO Cornerstone | Calendar Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/leco-cornerstone/id546739092/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 41 months |
| Monetization | **Free** | Paid |
| Size | 59 MB | 4 MB |
| Requires iOS | **8.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LECO Corporation](https://appshunter.io/developer/546739095) | [Systemiko Inc.](https://appshunter.io/developer/680630947) |

## What reviewers say

### LECO Cornerstone

[App page](https://appshunter.io/ios/app/leco-cornerstone/id546739092)

Monitor your LECO instrument's status and results remotely from your device. View data, check maintenance, and receive vital updates on analysis completion and system information.

**Highlights:** Remote instrument status monitoring, View set and replicate results, Data visualization on plots, Check maintenance status, Access methods and details, Receive vital message updates

**Features:** macOS Compatibility

**In-app purchases:** none


### Calendar Clock

[App page](https://appshunter.io/ios/app/calendar-clock/id1451445740)

This app displays the current year, month, week, and time on a single screen with a clean design. It offers customizable theme colors and functions as a desk clock. The app disables device sleep mode while active.

**Highlights:** All-in-one screen display, Year, month, week, day, hour, minute, second, Switchable theme colors (dark, light, green, blue), Disables device sleep mode, Acts as a desk clock

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LECO Cornerstone free?

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

### Is Calendar Clock free?

Calendar Clock costs $0.99, with no in-app purchases.

### Do LECO Cornerstone or Calendar Clock have ads?

Neither LECO Cornerstone nor Calendar Clock shows ads.

### Which is updated more often, LECO Cornerstone or Calendar Clock?

LECO Cornerstone ships an update every 5 weeks, and Calendar Clock every 41 months. Most recently, LECO Cornerstone was updated on June 8, 2026 and Calendar Clock on September 10, 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.*