# Check Calendar vs ChalkTimerPRO

The clearest difference is review sentiment: ChalkTimerPRO at 100% against Check Calendar's 53%. ChalkTimerPRO also leads on in-app purchases (none vs 1) and rating (5.0 vs 4.7). Check Calendar's advantage is price (Free vs $5.99) and ratings volume (1.6K vs 4). On ads and device support there is nothing between them.

Check Calendar is free to download; ChalkTimerPRO costs $5.99 up front. Check Calendar sells 1 one-off in-app purchase. ChalkTimerPRO asks for nothing beyond the download.

ChalkTimerPRO holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Check Calendar has 1.6K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 53% of Check Calendar's written reviews are positive against 100% of ChalkTimerPRO's.

Check Calendar ships an update every 4 days, ChalkTimerPRO every 10 days. The most recent releases landed on November 11, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Check Calendar | ChalkTimerPRO |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | [4.7 (1.6K ratings)](https://appshunter.io/ios/app/check-calendar-habit-tracker/id1563837295/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/chalktimerpro/id6754783505/reviews)** |
| Number of ratings | **1.6K** | 4 |
| Positive reviews | 52.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 10 days |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 58 MB | 19 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [naoki otsu](https://appshunter.io/developer/1082476153) | [Kristo Designs LLC (US)](https://appshunter.io/developer/480588450) |

## What reviewers say

### Check Calendar

[App page](https://appshunter.io/ios/app/check-calendar-habit-tracker/id1563837295)

Track your daily habits by marking them on a calendar. Customize your experience with notes, emojis, and color themes. Visualize progress with reports and receive timely notifications to stay on track. Data is secured locally with biometric authentication and can be exported.

**Highlights:** One-tap calendar check-offs, Customizable notes and emojis, Unlimited habit categories, Progress reports and graphs, Configurable notifications, Data backup and restore, Widget support, Dark mode and color themes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Pay Once) | $4.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- ✅ Effective for tracking habits
- 📅 Convenient calendar view
- 🎨 Customizable icons and emojis

**What reviewers complain about**

- 💰 Paid app with limited free trial
- 🔒 Lack of free version options
- 🔄 Data loss on device change
- 🤔 Unclear pricing and subscription model

**Reported bugs**

- Inconsistent date tracking
- Syncing issues between devices
- Unexpected loss of data and progress

**Requested features**

- Add widget support
- Implement reminder/notification system
- Provide more data visualization and analytics
- Allow selective clearing of check marks


### ChalkTimerPRO

[App page](https://appshunter.io/ios/app/chalktimerpro/id6754783505)

This app provides precision timing for gymnastics competitions, adhering to USA Gymnastics rules. It automates warm-up and competition timing, including fall and bump timers, reducing stress for coaches and meet directors. Features include dynamic time calculation, audio/visual cues, and offline functionality.

**Highlights:** USAG Rules-Based Warm-Up Timing, Competition Timing Suite, Fall and Bump Timers, Dynamic Time Calculation, Audio and Visual Cues, Offline Reliability (PRO version)

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

**In-app purchases:** none


## Frequently asked questions

### Is Check Calendar free?

Check Calendar is free to download, with in-app purchases available.

### Is ChalkTimerPRO free?

ChalkTimerPRO costs $5.99, with no in-app purchases.

### Which has better reviews, Check Calendar or ChalkTimerPRO?

ChalkTimerPRO is rated higher. Check Calendar averages 4.7 out of 5 from 1.6K ratings, while ChalkTimerPRO averages 5.0 from 4 ratings.

### Do Check Calendar or ChalkTimerPRO have ads?

Neither Check Calendar nor ChalkTimerPRO shows ads.

### Which is updated more often, Check Calendar or ChalkTimerPRO?

Check Calendar ships an update every 4 days, and ChalkTimerPRO every 10 days. Most recently, Check Calendar was updated on November 11, 2026 and ChalkTimerPRO on October 30, 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.*