Campus Labs® Event Check vs Circle & Sphere
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Campus Labs® Event Check
This app allows campus event hosts to securely check students into events using their mobile devices. It acts as a companion to a web application, streamlining the event attendance process for organizers.
- Mobile event check-in
- Secure student entry
- Companion to web app
- Event host tool
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Campus Labs® Event Check-in is a companion app for the Campus Labs® Engage student engagement web application that enables campus event hosts to easily and securely check students into events using mobile devices. This app is for event hosts, students do not need to download this app to check-in at events.
Circle & Sphere
Instantly solve geometry problems for homework and exams. Calculate circle and sphere properties with step-by-step solutions. Access learning videos and manage your calculations.
- Circle calculations (radius, diameter, circumference, area)
- Sphere calculations (surface area, volume)
- Circular sector calculations
- Step-by-step solutions
- Learning videos
- Solution management
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Do your homework instantly. Prepare for exams without stress. Free, complete step-by-step solutions. Enter your values and calculate: - Circle: radius, diameter, circumference and area - Sphere: surface area and volume - Circular sector: arc length and central angle HOW IT WORKS Enter your values in the correct fields and get started. You receive the solution instantly and can share it with friends or classmates. YOUR PERSONAL DATA We don’t need it. Only anonymized data is collected, for example: - which features are used - how many solutions are generated This helps us improve. We cannot identify you. COSTS Everything is free to use. 24/7 access to your solutions. All solution steps always remain complete. If you need many solutions in a short time, various purchase options are available. EXTRAS - Overview of all measures - all length units - curated learning videos - feedback for incorrect inputs - manage your own solutions - app introduction CONTACT Questions and feedback via Discord or directly in the app review.
Screenshots
Verdict
The clearest difference is review sentiment: Circle & Sphere at 100% against Campus Labs® Event Check's 43%. Campus Labs® Event Check's advantage is rating (4.8 vs 4.0) and in-app purchases (none vs 8). On price, update cadence, 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
Both are free to download. Circle & Sphere sells 8 one-off in-app purchases. Campus Labs® Event Check asks for nothing beyond the download.
Campus Labs® Event Check holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Campus Labs® Event Check has 1.4K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 43% of Campus Labs® Event Check's written reviews are positive against 100% of Circle & Sphere's, so the app with the better star average is not the one people write more warmly about.
Campus Labs® Event Check ships an update monthly, Circle & Sphere every 3 weeks. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.
| Parameter | Campus Labs® Event Check | Circle & Sphere |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (1.4K ratings) — better | 4.0 (4 ratings) |
| Positive reviews | 42.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.4K — better | 4 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 31 MB | 180 MB |
| Age rating | 4+ | 4+ |
| Developer | Campus Labs, Inc. | Glindemann, Sennoun, Langer GbR |
Customer experience
Campus Labs® Event Check
Circle & Sphere
In-app purchases
Campus Labs® Event Check
No in-app purchases
Circle & Sphere
- +30 User Tokens$0.29
- +1 Convenience Token / 6h, max. +2$0.59
- +2 Convenience Tokens / 6h, max. +4$0.99
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- +150 User Tokens$0.99
- +300 User Tokens$1.49
- +4 Convenience Tokens / 6h, max. +8$1.59
- Remove Ads$2.99
- Lifetime Access$2.99
Questions
Is Campus Labs® Event Check free?
Is Circle & Sphere free?
Which has better reviews, Campus Labs® Event Check or Circle & Sphere?
Do Campus Labs® Event Check or Circle & Sphere have ads?
Which is updated more often, Campus Labs® Event Check or Circle & Sphere?
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