# Knowix, LLC vs HEY Calendar

The clearest difference is update cadence: HEY Calendar at fortnightly against Knowix, LLC's every 3 months. Knowix, LLC's advantage is iOS requirement (13.0 vs 17.2). 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.

Knowix, LLC ships an update every 3 months, HEY Calendar fortnightly. Both last shipped on November 3, 2026.

## The numbers

| Metric | Knowix, LLC | HEY Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (659 ratings)](https://appshunter.io/ios/app/hey-calendar/id6449716061/reviews)** |
| Number of ratings | — | **659** |
| Positive reviews | — | 56.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 43 MB | 64 MB |
| Requires iOS | **13.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Knowix, LLC](https://appshunter.io/developer/1661221233) | [37signals LLC](https://appshunter.io/developer/363576304) |

## What reviewers say

### Knowix, LLC

[App page](https://appshunter.io/ios/app/knowix-llc/id1661221231)

**Features:** macOS Compatibility

**In-app purchases:** none


### HEY Calendar

[App page](https://appshunter.io/ios/app/hey-calendar/id6449716061)

This calendar app organizes your schedule around days and weeks, reflecting how people naturally think. It supports habits, highlights important events, and accommodates flexible scheduling for tasks that don't have a fixed time. Enjoy a full-featured experience with unique twists on conventional calendar functions.

**Highlights:** Weekly view focus, Habit tracking, Event highlighting, Flexible scheduling for 'maybe' tasks, Event countdowns, Day labels for context, Color-coded sub-calendars, Flexible reminders

**In-app purchases:** none

**What reviewers like**

- 🚀 Thoughtful and different approach
- 👍 Lovely UI
- 👍 Wonderful UI
- 👍 Innovative features like 'Sometime this Week'

**What reviewers complain about**

- 🐛 Buggy and unreliable syncing
- 🔍 Lacks integration with other calendars
- 🔍 Missing key features like month/year view and search
- 🔍 Clunky and unintuitive user experience

**Reported bugs**

- Events not showing up on calendar
- Notifications not working as expected
- Frequent crashes and performance issues
- Inability to edit events from external calendars

**Requested features**

- Two-way sync with other calendar services
- Ability to set custom recurrence patterns
- Integration with mapping/navigation apps
- Family/shared calendar support
- Calendar widget for quick access


## Frequently asked questions

### Is Knowix, LLC free?

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

### Is HEY Calendar free?

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

### Do Knowix, LLC or HEY Calendar have ads?

Neither Knowix, LLC nor HEY Calendar shows ads.

### Which is updated more often, Knowix, LLC or HEY Calendar?

Knowix, LLC ships an update every 3 months, and HEY Calendar fortnightly. Most recently, Knowix, LLC was updated on November 3, 2026 and HEY Calendar on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*