Imagine going out with your friends and after an amazing meal you have to sit and split the bill manually. Well not anymore with slip split you take a photo of the bill and get a list of items
Inspiration: ## Inspiration: I used to go out with my friends and after eating we used to sit and manually write the bill at the end. this process used to take 20 to 25 minutes and as a computer science student i thought we could definitely automate this process.
What it does: The app takes a photo of a bill and passes the image to a gemini api where it is configured to find all the items in the bill. this list is presented on the app that you can manually allocate to each person. unfortunately bills don't have a list of names and what they ordered so I could not automate this part.
How we built it: ## Inspiration: The application is built using Swift, and the backend uses the Google Gemini API. The API is responsible for taking the slip and extracting all the text to ensure all the infomation is recorded correctly. I also used the coding agent on Antigravity to help during development, as I don’t yet have much experience with Swift. On AntiGravity i used gemini 3 to build the front end and i used google AI studio to manage the Gemini 3 VLM.
Challenges we ran into: Currently, the app is configured for U.S. dollars and assumes tax is added separately per item. In South Africa, tax is included in the listed price, which causes inconsistencies in the final amounts. I’m still working on automating this distinction, but if the API can’t reliably solve it, I plan to add a manual toggle. The goal is for users to simply take a photo and save time, without needing to configure settings, so I’m aiming to resolve this through the API if possible.
Accomplishments that we're proud of: I am proud of the fact that i was able to take an idea i have and with the help of anti gravity compensate for my lack of experience to make a product i genuinely believe would help people.
What we learned: I learn alot about the gemini API as well as how to compile and build IOS Applications. I learnt about swift and i hope to build more products using these excellent tools.
What's next for SlipSplit: I’d like to expand SlipSplit for use on group trips and add analytics features, such as dashboards that help users understand where they’re spending money. I also want to implement a payment feature, so if one person pays the full bill, others can instantly pay their share through the app. This is an exciting space that hasn’t been explored much in terms of automation, especially at the scale I’m envisioning, and I’m very excited about what’s next.
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