Check Calendar vs ChalkTimerPRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Check Calendar
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.
- 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
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Check Calendar is an app that lets you track your habits by marking them off on a calendar. It's packed with features like one-tap check-offs, notes, unlimited tabs, emojis, reports, notifications, backup & restore, widgets, dark mode, and more. ■ Check off on the calendar Track your habits by checking them off on the calendar with a single tap. ■ Notes Supports both short and long notes! Write freely to keep your records. ■ Unlimited tabs Create unlimited categories like "Workout," "Study," and "Reading." ■ Emojis Change your checkmark to any emoji you like. ■ Checkmark color Change your checkmark to any color you like. ■ Reports Visualize your habit progress with graphs. You can freely change the time range, such as "Last 7 days," "Last 28 days," or "Last 6 months." ■ History View your check-off history, a list of past notes, and more. ■ Notifications Send notifications at any time with any message you choose. Use them so you never forget your habits. ■ Backup / Restore Automatically back up and restore your data. You can transfer your data even across different devices. ■ Widget Check off on the calendar and view your totals right from the widget, without opening the app. You can also use the report widget to quickly check your cumulative, this month, and last month check-off counts. ■ Dark mode Choose your theme from "Light mode," "Dark mode," or "Switch automatically based on device settings." ■ Color theme Change the background color to any color you like. ■ Archive Hide calendars you don't want to see by archiving them. ■ Biometric authentication Supports Face ID and Touch ID. Keep your important records safe and secure. ■ CSV export Export an individual calendar or all of your data in CSV format. ■ Check count Freely set how many times you can check off per day. ■ Security Your data is stored only on your device. It is never sent to third parties. ■ No login required Start using the app right away without signing in. ■ Offline support Works even without an internet connection. ■ Privacy Policy https://checkcalendar.app/privacy-policy ■ Contact If you have any requests or questions, please feel free to reach out through the in-app contact form or via the email address below. info@checkcalendar.app
ChalkTimerPRO
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.
- USAG Rules-Based Warm-Up Timing
- Competition Timing Suite
- Fall and Bump Timers
- Dynamic Time Calculation
- Audio and Visual Cues
- Offline Reliability (PRO version)
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Take the stress out of warm‑up and competition timing. ChalkTimer is the precision timing app built for gymnastics competitions. Designed by coaches and meet directors, it follows USA Gymnastics (USAG) Rules & Policies to deliver automatic, rule‑compliant warm‑up timing—no spreadsheets, no volunteers, no stress. And now, ChalkTimer goes even further with fully functional competition timing built right in. Every event. Every scenario. Every timing rule handled automatically. Included in the new Competition Timing Suite: • All event timers for every apparatus • Fall timers for accurate, rule‑compliant deductions • Bump/Touch timers for athlete readiness and equipment adjustments • General stopwatch for flexible timing needs across the meet Whether you’re coaching, judging, or running the meet, ChalkTimer keeps your event moving with clarity, fairness, and confidence. --- For Coaches: More Time to Coach, Less Time on the Clock Coaches shouldn’t be juggling stopwatches or second‑guessing timing rules. ChalkTimer handles the math and the countdowns so you can focus on your athletes. • Instantly calculates warm‑up times by level • Visual and audio cues keep everyone on track • Ensures fairness across all rotations • Works on any device—no setup headaches • Lets you coach without watching the clock --- For Meet Directors: Professional Timing Without Extra Staff Running a meet is complex—timing shouldn’t be. ChalkTimer eliminates the need for volunteer timers and manual calculations, giving you a polished, automated solution. • Supports over 144 USAG‑compliant timing combinations • Custom time override for unique formats • Keeps sessions on schedule and transitions smooth • Works offline—no WiFi, no problem (PRO version required) • Projects cleanly to displays or judge panels • Makes your meet look and run like a championship --- Key Features That Set ChalkTimer Apart • Dynamic time calculation by level and athlete count • Audio and visual alerts for seamless transitions • One‑tap reset between rotations • Flexible display modes for any setup • Offline reliability—built for real‑world gym conditions (PRO version required) • Intuitive interface for fast, frustration‑free use --- Built by Gymnastics Pros, for the Gymnastics World ChalkTimer was born from the chaos of real meets. Created by experienced coaches and meet directors, it’s engineered to solve the exact problems you face on competition day. From small invitationals to large‑scale events, ChalkTimer brings order, accuracy, and peace of mind. --- Why ChalkTimer Wins • Trusted USAG rule compliance • Saves time, staff, and sanity • Elevates your meet’s professionalism • Keeps athletes, coaches, and judges in sync • Designed with the gymnastics community in mind --- Run your meet like clockwork—download ChalkTimer today. Visit https://chalktimegymnastics.com for more details.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Check Calendar | ChalkTimerPRO |
|---|---|---|
| Price | Free — better | $5.99 |
| Rating | 4.7 (1.6K ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 52.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.6K — better | 4 |
| Update frequency | Every 4 days — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.6 |
| Further details — not scored | ||
| Size | 58 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | naoki otsu | Kristo Designs LLC (US) |
Customer experience
Check Calendar
ChalkTimerPRO
Bugs and requests
Check Calendar
Reported bugs
3 issues- Inconsistent date tracking
- Syncing issues between devices
- Unexpected loss of data and progress
Requested features
4 requests- Add widget support
- Implement reminder/notification system
- Provide more data visualization and analytics
- Allow selective clearing of check marks
ChalkTimerPRO
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Check Calendar
- Premium (Pay Once)$4.99
ChalkTimerPRO
No in-app purchases









