01
Find the right product
Turn an ambitious idea into a clear, focused plan. We shape the experience, map the essentials, and decide what your first version really needs.
INDEPENDENT MOBILE APP STUDIO
Good ideas.
Great apps.
We turn your next big idea into a mobile app people love to use, with thoughtful design, native development, and AI features that make everyday tasks easier.
SMALL DETAILS. BIG DIFFERENCE.
Made with care.
Made by Celine.
Made by Celine.
IN THE SPOTLIGHT NestLog
BIG PICTURE THINKING.
ATTENTION TO EVERY PIXEL.
ATTENTION TO EVERY PIXEL.
Product strategy Native iOS apps AI-powered apps Ongoing care
01 / WHAT WE DO
Your ambition.
Our craft.
Whether you’re starting with a spark or improving something already in people’s hands, we help you make the next move.
02
Build an app that feels right
Native iPhone and iPad apps, with AI features such as conversational assistants, personalized recommendations, and intelligent search. Fast, intuitive, and carefully built.
03
Keep making it better
Launch is a beginning. Refine an existing app, bring new features to life, and keep the experience moving forward as your product evolves.
02 / BUILT BY CELINE
Ideas, out in the world.
A closer look at the care
we put into our work.
OUR OWN PRODUCT / iOS
NestLog.
Little moments.
A little more peace of mind.
A baby care companion that brings feeds, sleep, diapers, and milestones into one calm, easy-to-use place. Made for the moments when life is anything but predictable.
Private by designiCloud syncWidgets & Live Activities
Meet NestLog 
Less tapping.
More living.
03 / HOW WE WORK
A clear path from
“what if” to what’s next.
Good software starts with good conversations.
Here’s how we move your idea forward, together.
Get to the heart of it
We talk about your idea, your audience, and the problem worth solving. Then we define a practical scope.
Make it feel real
Map the journey and explore the design. Get a clear sense of the experience before development begins.
Build, test, refine
Bring the app to life with regular check-ins. Test the details and make room for useful feedback.
Launch & look ahead
Prepare for release, plan the next steps, and keep improving as your product finds its place.
04 / THE STUDIO
Small by choice.
Invested by nature.
Celine Software is a small Canadian software company based in Toronto, Ontario. We believe the best apps make someone’s day a little easier.
We build our own products, like NestLog, and bring that same product mindset to your project. Every interaction matters. Every decision should have a reason. And the people using your app always come first.
Let’s build something worthwhileA FEW GOOD QUESTIONS
Before we
say hello.
I have an idea. Where do we start?
Start with a conversation. Tell us who your app is for, what you’d like it to do, and where you are in the process. You don’t need a finished brief or technical background; we can work through the next steps together.
Can you help with an existing app?
Yes. Share what’s working, what isn’t, and what you’d like to change. We can discuss new features, design improvements, performance, or ongoing maintenance after reviewing your app.
Can you build AI-powered mobile apps?
Yes. We can build a new AI-powered mobile app or add AI features to an existing one. We’ll help identify where AI adds value and plan the experience, integrations, and data handling around your users.
Which platforms do you focus on?
Our focus is native iOS experiences for iPhone and iPad, including Apple platform features such as iCloud sync, widgets, and Live Activities. If you have a broader platform brief, include it in your inquiry so we can discuss the right approach.
How much will my app cost, and how long will it take?
That depends on the scope, features, and stage of your project. Once we understand your needs, we can discuss a realistic plan, estimate, and timeline. If you have a budget or launch date in mind, let us know from the start.
BIG IDEA? SMALL QUESTION?
Let’s make
something great.
Tell us what you have in mind.
We’d love to hear where you want to go.