Number Line, by MLC vs Classkick
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Number Line, by MLC
This app allows students to visualize number sequences and demonstrate mathematical strategies. It supports various number types and offers tools for annotation, problem-solving, and sharing work. Ideal for elementary classrooms and iPad learning environments.
- Visualize number sequences
- Demonstrate counting, adding, subtracting, multiplying, dividing
- Use whole numbers, fractions, decimals, or negative numbers
- Add custom tick marks and labels
- Hide and reveal numbers and jumps
- Annotation and drawing tools
- Save and share work
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Number Line helps students visualize number sequences and demonstrate strategies for counting, comparing, adding, subtracting, multiplying, and dividing. Choose number lines labelled with whole numbers, fractions, decimals, or negative numbers. Or use a blank number line, with or without tick marks. Describe intervals between points on the line using forward or backward jumps above and below the line. Jumps can be labelled with their values or left blank. Add custom tick marks to the number line to show equivalence or compare number values. Show strategies with drawing and annotation tools. Hide elements of the sequence shown on the number line, which challenges students to use what they know about number relationships and computation to identify those missing elements. This virtual number line is an open-ended educational tool, ideal for elementary classrooms and other learning environments that use iPads. For more Number Line resources and other apps, visit: www.mathlearningcenter.org/apps FEATURES • Mark the number line with multiples of whole numbers, fractions, or decimals. In addition, set the starting value of the line, including using negative values. • Add and manipulate forward and backward jumps, above or below the line. • Label jump bars, manually or automatically, to show intervals or hide labels altogether. • Add custom tick marks and values to blank number lines. • Hide and reveal numbers on the number line. • Hide and reveal jumps, numbers, and other elements with resizable covers to create your own problems and model strategies. • Use the drawing tools to annotate work and show understanding. • Add equations, expressions, and descriptions with the math text and writing tools. • Share your work by saving an image or providing a share code to others. MORE APPS For more Number Line resources and other apps, visit: www.mathlearningcenter.org/apps LEARN MORE To learn about Bridges in Mathematics, an elementary curriculum that employs visual models like number line, visit: www.mathlearningcenter.org/bridges/overview ABOUT US This resource is brought to you by The Math Learning Center, a nonprofit organization dedicated to K-12 education since 1976. ACKNOWLEDGEMENTS This app was crafted by Clarity Innovations. We help improve teaching and learning by creating solutions that match promising technologies with the needs of education. Visit us: www.clarity-innovations.com
Classkick
This app allows students to complete assignments digitally and receive instant feedback from teachers and classmates. Educators can create paperless assignments, monitor student progress in real-time, and facilitate peer-to-peer learning. It aims to increase student feedback and reduce grading time.
- Create paperless assignments
- Real-time student work monitoring
- Instant teacher feedback
- Anonymous peer-to-peer help
- Work at own pace
- Ask for help privately
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Classkick is a free app that students work on and get help instantly from their teacher and peers. Students work on assignments with their Chromebooks, laptops, or iPads, while getting help from teachers and peers instantly. Teachers create assignments, see all their students’ work in real-time, and give LOTS of student feedback. Best of all, students can help each other anonymously. Using Classkick, feedback to students increases by 300% and grading time is cut in half. “Classkick is every teacher’s dream.” - Lynne Shalman, Chapin School “Students love Classkick...it was magic!” - Greg Port, Seton College TEACHERS... - CREATE paperless assignments using existing worksheets, audio, video or web content. - SEE every students’ work simultaneously. - GIVE instant feedback when it is most important. - FACILITATE peer-to-peer feedback and learning. STUDENTS... - WORK at their own pace and even on their own time. - ASK for help privately. - HELP their peers. USE IT... - in class or at home. - in traditional or flipped classrooms. - as a group together or on your own time individually. FOR… - assignments - quizzes - station work - do nows/exit slips - guided practice - independent practice - homework
Verdict
The clearest difference is rating: Number Line, by MLC at 4.4 against Classkick's 3.1. Number Line, by MLC also leads on review sentiment (67% vs 33%). Classkick's advantage is update cadence (every 9 days vs every 13 months) and ratings volume (727 vs 15). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
Number Line, by MLC holds the better App Store score, 4.4 against 3.1. That said, the two scores are not equally well evidenced: Classkick has 727 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 67% of Number Line, by MLC's written reviews are positive against 33% of Classkick's.
Number Line, by MLC ships an update every 13 months, Classkick every 9 days. Both last shipped on November 6, 2026.
| Parameter | Number Line, by MLC | Classkick |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (15 ratings) — better | 3.1 (727 ratings) |
| Positive reviews | 66.7% of reviews — better | 33.0% of reviews |
| Number of ratings | 15 | 727 — better |
| Update frequency | Every 13 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPad |
| Requires iOS | 16.1 | 15 — better |
| Further details — not scored | ||
| Size | 7 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | Classwork Co |
Customer experience
Number Line, by MLC
Classkick
Bugs and requests
Number Line, by MLC
Not enough reviews yet to summarise bugs or requests.
Classkick
Reported bugs
3 issues- Assignments not loading properly
- Inability to save or access work
- Incompatibility with newer devices/OS
Requested features
4 requests- Add split-screen support
- Improve text/writing controls
- Better Apple Pencil integration
- Enhance stability and performance
In-app purchases
Number Line, by MLC
No in-app purchases
Classkick
No in-app purchases
Questions
Is Number Line, by MLC free?
Is Classkick free?
Which has better reviews, Number Line, by MLC or Classkick?
Do Number Line, by MLC or Classkick have ads?
Which is updated more often, Number Line, by MLC or Classkick?
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