Number Line, by MLC vs DroneBlocks
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
DroneBlocks
Program drones using a block-based interface. Create custom flight paths, control camera functions, and execute missions with virtual joysticks. Supports various drone models and offers pre-flight checks for compliance.
- Block programming interface
- Virtual joysticks for control
- Pre-flight compliance checks
- Camera and photo blocks
- Telemetry data display
- Offline mission storage
- Support for Tello and DJI drones
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What's New in 4.1.1 - We've made improvements and fixed bugs for a smoother flight. What's New in 4.1 - Pre-flight checks to ensure your flight commands are compliant with the drone specs. - The validations include: curve range, flight distance ranges, arc radius curve checks - User messages indicate which values are problematic in metric and imperial units. New in DroneBlocks 4.0 - Control your drone with virtual joysticks now included in the app New in DroneBlocks 3.6 - Tries to load blocks from the cache if your device is offline. New in DroneBlocks 3.5 - Bug fix for Tello Talent scrolling text and space characters - Simplify the connection process by setting focus to the SSID field and forcing capitalization New in DroneBlocks 3.4 - Support for Robomaster TT (aka Tello Talent) LED block coding! New in DroneBlocks 3.3 - Watch your blocks highlight as Tello executes its mission New in DroneBlocks 3.0 - Video feed for Tello & Tello EDU - Camera blocks that include "photo" and "photo interval" New in DroneBlocks 2.6 - Telemetry for Tello & Tello EDU (Altitude, ToF, Pitch, Roll, Yaw) New in DroneBlocks 2.5 - Offline storage. Users can access and save missions after logging in, accessing "My Missions", and going offline. New in DroneBlocks 2.4 - Improved Tello connection process - Added better handling of Tello network display - Fixed blank screen issue when switching between DJI and Tello blocks New in DroneBlocks 2.3 - Tello users can now set the default units to metric New in DroneBlocks 2.2.1 - DJI SDK 4.10 with improved support for Spark - Remember Tello blocks selection - Bug fix for switching back to Tello from DJI blocks New in DroneBlocks 2.1.0 - Tello EDU support - Improved command handling - Abort mission New in DroneBlocks 2.0.0 - Curve flight block for Tello New in DroneBlocks 1.2.7 - Bug fix for iPhone X and safe area conflict with menu New in DroneBlocks 1.2.6 - Spark Support!!!! - DJI SDK 4.6.1 New in DroneBlocks 1.2.5 - DJI SDK 4.5 New in DroneBlocks 1.2.4 - Improved Tello connection process New in DroneBlocks 1.2.4 - Fix for navigation mode not open error - Fix to improve the success of subsequent missions while in the air New in DroneBlocks 1.2.2 - Tello support: tap on hambuger icon and then tap "Connect to Tello" - Be sure to follow the Tello connection instructions - Free programming with Tello course at https://learn.droneblocks.io - DJI SDK 4.4.0 - Better land block handling - Don't require map preview for basic blocks like photo, yaw, gimbal New in DroneBlocks 1.2.1 - Fix for Google logins - Ability to switch between Google accounts New in DroneBlocks 1.2.0: - Users can now execute missions in mid air without needing takeoff and land blocks - Added speed to fly forward block - Added speed to yaw block - New photo interval block to take X number of photos at Y interval - New record video duration block DroneBlocks allows users to easily program fun and useful missions using block programming with the DJI Phantom 3, DJI Phantom 4, Mavic Pro and Inspire 1. Users can drag and drop blocks onto the canvas to command their drone to follow a basic flight plan. Coupled with the DroneBlocks curriculum, educators can teach students about all aspects of STEM. For example, lesson plan #2 is a "Dronie" mission that teaches students about geometry and determining the best angle to tilt the camera for the perfect dronie shot. Other lessons include learning how to use loops, fly in a star pattern, shoot a panorama, and much more. You can access our curriculum bundle online for free. Just go here and enroll in the course and you'll get access to eight fun programming lessons: http://learn.droneblocks.io DroneBlocks is currently being used in several classrooms around the country and we're looking forward to see what exciting and interesting missions our users will create!
Screenshots
Verdict
The clearest difference is rating: Number Line, by MLC at 4.4 against DroneBlocks's 3.4. Number Line, by MLC also leads on review sentiment (67% vs 49%). DroneBlocks's advantage is update cadence (every 2 months vs every 13 months) and device support (3 vs 1). 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 3.4. Both are backed by a comparable volume of ratings — 15 and 58 respectively. Written reviews point the same way: 67% of Number Line, by MLC's written reviews are positive against 49% of DroneBlocks's.
Number Line, by MLC ships an update every 13 months, DroneBlocks every 2 months. Both last shipped on November 6, 2026.
| Parameter | Number Line, by MLC | DroneBlocks |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (15 ratings) — better | 3.4 (58 ratings) |
| Positive reviews | 66.7% of reviews — better | 48.9% of reviews |
| Number of ratings | 15 | 58 — better |
| Update frequency | Every 13 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | The Math Learning Center | DroneBlocks, LLC |
Customer experience
Number Line, by MLC
DroneBlocks
Bugs and requests
Number Line, by MLC
Not enough reviews yet to summarise bugs or requests.
DroneBlocks
Reported bugs
16 issues- App keeps crashing
- App breaks when trying to flip
- Drone blew up and smashed window
- App doesn't execute code
- App crashes after app crash
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- UI mushes together on small phones
- Screen remains completely blank
- App is blank
- Doesn't size screen properly on iPhone SE
- App hangs after connecting
- Camera and 'Land at Home' features inactive
- Internal error when connecting to Tello
- App glitches so much
- Barely connects
- Move blocks don't work
- UI unstable, sometimes shows nothing connected
Requested features
7 requests- Add camera controls for Tello
- Allow local saving of missions
- Improve UI for smaller phones
- Add more login options for Chinese users
- Support for metric units
Show 2 moreShow fewer
- Longer distance control
- iPhone support
In-app purchases
Number Line, by MLC
No in-app purchases
DroneBlocks
No in-app purchases
Questions
Is Number Line, by MLC free?
Is DroneBlocks free?
Which has better reviews, Number Line, by MLC or DroneBlocks?
Do Number Line, by MLC or DroneBlocks have ads?
Which is updated more often, Number Line, by MLC or DroneBlocks?
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