Gallery
Discover apps people built on Collabby by chatting. Run them, then remix to make them yours.
When Traveling
Ready to Remix
Make a Word List
Apps for Shops & Solopreneurs
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Invitations & Gatherings
Classroom tools
Create Your Own Journal
Water Pressure Playground
Same depth means the same pressure. A middle-school playground that busts shape and surface-area myths with P=ρgh. This app was built on Collabby too · Tap 🍴 Remix below to get your own copy and change anything you like.
Shop reply situations
Customer line → three replies → kind / quick-fix / upsell shop template.
Class & team onboarding quiz
Onboarding quiz template with class/team facts for new members.
Read faces & feelings
Look at a face and pick the matching feeling — a short emotion test.
Periodic Table 118
A periodic table with all 118 elements. Tap the table to read periods and groups, sort families by color from alkali metals to noble gases, and find the elements that are gases or liquids at room temperature. Each tab has 4 missions. This app was built on Collabby too · Tap 🍴 Remix below to get your own copy and change anything you like.
Nonogram Puzzle
Read the numbers beside each row and fill in squares to reveal a hidden picture in this daily 5×5 logic puzzle with one unique solution.
Emergency Contacts & Insurance
An emergency contact app that keeps embassy, insurance, and local contacts on a dark wallet card so you can call right away or copy a number.
Accommodation & Transport Check
Check your accommodation and transport in accordion panels, and track your travel prep progress with a ring.
Daily Closing Check
Check the safe, cleaning, social media, and power areas—finish them all to earn the closing-complete stamp.
Simple Customer Cards
A Rolodex-style customer card that flips through names, preferences, allergies, and next visits one card at a time.
Salon Service Menu
A salon menu showing services with category tabs (Cuts · Care · Packages) and time-needed badges.
Inventory & Orders
Track stock with quantity bars, spot red low-stock alerts, and gather items into an order note.
Queue & Turn Number
Like a kiosk, this turn app displays the current number in large type and moves the queue along with Next and Ticket Number.
Today’s Sales Log
Enter items, quantities, and prices in the table, and watch the hero total at the top grow instantly.
Restaurant & Café Picks
Stack up restaurant and café cards, then vote to move your travel favorites up the ranking.
Rates & Tips
A conversion and tip calculator that shows amounts, exchange rates, tips, and people as big HUD numbers on one screen.
Secret Santa
Add the names and shuffle to flip the envelopes and reveal who gives a gift to whom.
Foods to Avoid
Choose allergy, vegetarian, religious, or other chips to mark what each person can’t eat.
Gift Wishlist
Post the gifts you want as cards and let each one be claimed, so nobody ends up buying the same present twice.
Travel Itinerary
Pin each day’s times, places, and notes on a vertical timeline to see the whole day at a glance and share it with your travel buddies.
What Should We Bring?
Give everyone a spot to list and check off what they’ll bring, so you can see at a glance who’s bringing what.
Where Should We Meet?
Tap the places each person can go to find the meeting spot that works for the most people.
Travel Expenses
A travel expense book where you record daily spending by category and see the total at the bottom.
Roman Space Telescope Launch Simulator
Step through 11 stages from Falcon Heavy ignition to arrival at Lagrange point L2, following the Roman Space Telescope’s time, altitude, and speed.
World Clock
See the current time and time difference between two cities, then find the best time to contact each other on the day bar.
Packing List
Choose your trip type, season, length, and destination, and get a calculated packing list—then check off items as you pack.
Trip Planner
Choose how many nights and days, write what to do each day, add times, and check things off as you get ready for and enjoy your trip.
Classroom Signal Bell
Signal with a sound and a picture instead of your voice — eyes here, tidy up, line up and well done each ring a different tune and fill the classroom screen.
Gradient Descent and Loss Functions
Roll a ball downhill, opposite the slope, to find the minimum—and see how a high learning rate makes it bounce away.
Inscribed Angles and Tangents
Move a point around the circle to see that the inscribed angle stays the same, then discover why a tangent is perpendicular to the radius.
Shape Moves and Congruence
Slide, flip, and turn shapes to match the target, and discover that two reflections make a rotation.
Complex Numbers & the Complex Plane
Plot points on the complex plane and discover how multiplication rotates by adding angles and multiplying magnitudes, then draw regular polygons with powers.
Sampling and Bias
Change how you sample to see where bias comes from, and discover which biases remain even with larger samples.
Box Plots and Data Spread
See how one distant point pulls the mean, then use quartiles to make a box plot and spot outliers.
Binomial Distribution & Expected Value
Move the probability bars to see expected value as the balance point, then change n and p to reshape the binomial distribution.
Chain Rule & Composite Functions
Run the inner and outer machines separately to see how their two slopes multiply to make the overall slope.
Related Rates
See how one rate of change drives another as a ladder slips and a balloon inflates.
Differential Equations & Slope Fields
Draw slopes on a grid, then add curves that follow them to see what solutions to differential equations look like.
Sine and Cosine Rules
See how the circumcircle’s diameter stays the same as the angles change, then use the included angle to find the missing side.
Arithmetic & Geometric Sequences
Explore how terms grow using common differences and ratios, then pair the two sequences to discover a sum formula.
Exoplanet Hunt
A star dimming slightly or wobbling is enough to reveal a planet no telescope can see.
Atmospheric Stability and Cloud Formation
Whether rising air is warmer than its surroundings decides if clouds tower up or spread flat.
ATP Balance in Photosynthesis and Cellular Respiration
One glucose yields over thirty ATP with oxygen, but only two without it.
Pedigrees & Inheritance Patterns
When neither parent shows a trait but a child does, that trait is recessive.