Number Board vs GravyLensing
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Number Board
This app provides interactive number boards to foster a love for mathematics. It helps children as young as three develop number familiarity and hand-eye coordination, while older children can enhance their speed and accuracy in math. Daily practice through a unique approach aims to improve mastery of math and logic skills for all ages.
- Seven different number boards
- Develops number sequences
- Improves addition and subtraction
- Enhances multiplication and division
- Teaches fractions and percentages
- Multi-sensory skill development
- Tracks best three scores
Read full descriptionHide full description
StepUp Number Board helps develop a passion for numbers with our seven different boards improving and mastering Number Sequences, Addition, Subtraction, Multiplication, Division, Fractions and Percentages. Using our unique number board children as young as three, familiarise themselves with numbers developing both hand-eye co-ordination and multi-sensory skill. Older children improve their mind recognition, speed and accuracy whilst children of all ages and abilities will improve their mastery of maths and logic through the StepUp approach of daily practice. You play against yourself and your best three scores are recorded.
GravyLensing
Read full descriptionHide full description
GravyLensing brings gravitational lensing, the cosmic phenomenon where space-time bends around massive objects, into your hands. ESA's Euclid mission is mapping this effect across billions of galaxies to reveal the dark universe. Now you can explore that same physics yourself. Point your camera anywhere and watch space-time bend like light passing through a galaxy cluster. Built on the same Singular Isothermal Ellipsoid (SIE) models astronomers use, every lens is a real galaxy cluster observed by Hubble, JWST, and Euclid, faithfully recreated on your device. Features • Apply scientifically accurate gravitational lensing to your live camera feed, photos, or videos • Browse a gallery of real galaxy clusters, each with their own unique lensing signature • Touch and drag to position the lens exactly where you want it • Adjust distance to sweep from subtle warping to extreme Einstein rings • Record warped video or capture still images and save them to your photo library Inspired by ESA's Euclid mission to map the dark universe, GravyLensing puts the physics of warped spacetime in your pocket. No ads. No data collection. Just physics.
Screenshots
Verdict
The clearest difference is update cadence: GravyLensing at every 2 months against Number Board's every 76 months. Number Board's advantage is iOS requirement (12.0 vs 16.4). 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 Board ships an update every 76 months, GravyLensing every 2 months. The most recent releases landed on August 3, 2026 and September 10, 2026 respectively.
| Parameter | Number Board | GravyLensing |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (8 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 76 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 61 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | suhail hanif | WILLIAM JOSEPH ROPER |
In-app purchases
Number Board
No in-app purchases
GravyLensing
No in-app purchases
Questions
Is Number Board free?
Is GravyLensing free?
Do Number Board or GravyLensing have ads?
Which is updated more often, Number Board or GravyLensing?
Other comparisons















