Number Frames, by MLC vs Owlet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Number Frames, by MLC
This app provides virtual number frames to help elementary students visualize and manipulate numbers up to one hundred. It supports counting, comparing, and computing, aiding the transition from one-by-one counting to more efficient strategies. Custom frames can be created for advanced visualization of factors and fractions.
- Standard and custom number frames
- Variety of counters and colors
- 5s grid for grouping emphasis
- Resizable covers for problem modeling
- Drawing and annotation tools
- Math text and writing tools
- Shareable work via image or code
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Number Frames help students structure numbers to five, ten, twenty, and one hundred. Students use the frames to count, represent, compare, and compute with numbers in a particular range. The frames allow students see quantities as equal groups of other quantities and in relation to benchmark quantities. This helps primary students move away from one-by-one counting toward more efficient ways of counting and computing. As students advance, custom frames can be constructed to help visualize factors, products, fractional parts and more. These virtual versions of number frames are open-ended educational tools, ideal for elementary classrooms and other learning environments that use iPads. Number frames are a key model used in Bridges in Mathematics, second edition. Online preview available at: www.mathlearningcenter.org/bridges FEATURES: • Use standard 5-, 10-, 20-, and 100-frames, or create custom frames up to 12 x 12. • Choose from a variety of counters and colors. Drag single counters — or stacks of 5 and 10 — into frames or on to the workspace. • Apply a 5s grid to frames to emphasize every 5th line and reinforce grouping by five. • Hide and reveal counters 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
Owlet
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Owlet: Cube3 is an app that uses the Owlet CubeTower manipulative. Students create numbers by stacking small cubes in the columns of the CubeTower. Cube3 has five modes. Each corresponds to a different topic in place value: Tens, Hundreds, Money, Hundredths, and Thousandths. For each topic, there are five different activities. - Explore: Students place cubes in the CubeTower to create numbers that are shown on the tablet. - Make: Students are prompted to make a target number by placing cubes in the CubeTower. - Build: Students solve number puzzles. For example, students might be asked to build a number between 200 and 300 using 5 cubes. - Compare: Students create a number in the CubeTower and then compare it to a number generated by the app. - Round: Students use the CubeTower to round a number to a specified place.
Verdict
The clearest difference is update cadence: Owlet at every 6 months against Number Frames, by MLC's every 13 months. Owlet also leads on iOS requirement (12.0 vs 15.4). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Number Frames, by MLC ships an update every 13 months, Owlet every 6 months. The most recent releases landed on September 16, 2026 and September 8, 2026 respectively.
| Parameter | Number Frames, by MLC | Owlet |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (7 ratings) — better | — |
| Positive reviews | 88.9% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 13 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPad | iPad, Mac — better |
| Requires iOS | 15.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 123 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | BirdBrain Technologies LLC |
In-app purchases
Number Frames, by MLC
No in-app purchases
Owlet
No in-app purchases
Questions
Is Number Frames, by MLC free?
Is Owlet free?
Do Number Frames, by MLC or Owlet have ads?
Which is updated more often, Number Frames, by MLC or Owlet?
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