Cross-platform Flutter
One codebase, two stores; native-grade performance for community products.
Digital product & software
Mobile apps that live in the pocket
Production apps for iOS and Android: native or cross-platform, embedded AI, store publishing and operation after launch.
Stack Native · FlutterStores App Store · Google PlayCases Tech Week · Mazette
In short
Slash Digital Lab develops iOS and Android apps from Bogotá, and a production app is more than a companion: onboarding, notifications, offline, analytics and a release cycle. We publish to the App Store and Google Play and keep the app alive with your team.
Evidence: the official app of Colombia Tech Fest and the full Flutter app for Réseau Mazette (iOS and Android). For AI on the phone itself: small models on device. The rest of the product: digital products and web applications.
What we deliver
What a Slash app includes
We choose the stack by the case: Flutter when it sustains the product, native when the device demands it.
Native when it matters
Native iOS/Android for advanced capabilities: camera, sensors, payments.
Embedded AI
Copilots, recommendation and moderation inside the app.
Stores & releases
Publishing, versioning, review cycles and an update plan.
How we work
From idea to the stores
Discovery
Users, use cases and store constraints, defined in writing.
Prototype
The flow tested with real users before building everything.
Build & beta
Sprints with TestFlight and Play Console internal testing.
Launch
Publication, analytics, notifications and a release plan.
Scope and deliverables
What the project delivers
| Platforms | iOS · Android · web app. |
|---|---|
| Stack | Flutter or native, by case. |
| AI | Copilots and embedded models. |
| Offline | Maps and content without network. |
| Stores | Publishing, listings and releases. |
| Analytics | Events and KPIs from day one. |
Proof in production
Apps in the stores
Read more
Steel Bastion · Tower defense
A military tower defense on six fronts
Flutter game for Android and iOS: 60 missions against armoured columns, 10 weapons, a daily operation and survival fronts, with no ads.
Learn more →
Read more
Réseau Mazette · Flutter app
Full Flutter app for iOS and Android
Réseau Mazette connects French-speaking professionals and entrepreneurs in Spain. We shipped a full native Flutter app for iOS and Android: directory, events, messaging, memberships and AI copilot Mia, plus the branded web experience.
Learn more →
Read more
Nekonap · Logic puzzle
A daily puzzle about sleeping cats
Flutter logic puzzle for Android and iOS: one cat per row, column and patch, the same daily puzzle for everyone and 36 cats, with no ads.
Learn more →
Read more
Seismic Guard · Earthquake alerts
Earthquake warnings that reach iPhones too
Flutter app for Android and iPhone: relays Android earthquake warnings and adds EMSC, SGC and USGS alerts, with native Kotlin and Swift and a Supabase backend.
Learn more →
Frequently asked questions
The questions we hear often
Native or cross-platform?
Mostly Flutter, which compiles native iOS and Android apps from a single codebase; fully native development when the case needs specific capabilities.
Do you publish to the stores for us?
Yes: listings, screenshots and the review process included.
PWA instead of an app?
When the case allows it (see Peoplesnap); a web app skips stores entirely.
Post-launch support?
Yes: two months of support included after delivery; after that, releases, hotfixes and a priority-driven roadmap on the support plan you choose.
Notifications and chat?
Yes: segmented push and messaging, as in the Tech Week app.
How long does store publishing take?
Leave weeks, not days. Apple says it reviews most submissions in under 48 hours, but on Google Play a personal developer account created after November 13, 2023 first needs a closed test with at least 12 testers for at least 14 days.
How do users get in, and what happens to their data?
Through controlled access. In the Colombia Tech Fest app, every account starts from an invitation code and the guest accepts the privacy policy; in Réseau Mazette, members sign in with their website credentials. If the app lets people create accounts, it must let them delete them in the app: Apple and Google Play require it.
How long does it take to build an app?
It starts with a two-week discovery that sets the scope; then we work in two-week sprints with a demo, so you see the app grow on your phone. Add store review time and, after delivery, two months of included support. As a reference, we built the Colombia Tech Week iOS and Android app, used by 14,000 people, in 2 months.
How much does an app cost?
We quote every project precisely and to measure, after discovery. As a reference, a native iOS and Android app starts at around €10,000; the scope sets the final price.
Related capabilities
Where to next
Web
Web applications
Production web platforms: fast, secure and built to scale.
Learn more→ ProductDigital products
From idea to production: product, design and engineering in one team.
Learn more→ Strategy and regulationHow to build a great event networking app
Lessons from the apps we built for Colombia Tech Week 2026, Colombia Tech Fest and Réseau Mazette: access, agenda, directory, meetings, offline mode and AI.
Learn more→ SoftwareCustom software
We replace SaaS licenses with owned products your team controls.
Learn more→
Talk to Slash
Let's put it in production
Tell us your challenge. We reply within 24 business hours with an honest first read: if we can help, we'll say how; if not, we'll say who can.
I reply personally. No endless forms, no canned replies.