— Kosmos Packages

We never start
from scratch.

Our packages are code modules (front/back) that are already designed, battle-tested and 100% customizable, and that you own. We assemble, adapt and accelerate: your product saves weeks of development and gains robustness from the very first version.

50+
ready-to-use packages
1000+
pre-designed features, algorithms and logic
40%
reduced cost and timeline, on average
Let's discuss your projectRequest a quote
[ The principle ]

An industrial foundation
that we shape for your project.

A Kosmos package is a complete functional module of screens, logic and states already designed, battle-tested and ready to customize. We start from this foundation, then customize it to your brand, your business rules, your back-end. You keep full ownership of the code.

30 to 50%
saved through the modules concerned

Controlled cost

You don't pay to rewrite features that have been programmed countless times. The budget goes to what sets your product apart.

×5
faster to develop

Compressed timeline

A package integrates and customizes in days, where building from scratch takes weeks, sometimes months.

100%
customizable, and client-owned

Proven robustness

Every package has already run in production: edge cases, error states, accessibility. Your product starts on solid foundations.

[ A quick calculation ]
30 to 50%

less cost and time on packaged modules.

At equal scope and quality, starting from a package divides the implementation time and the budget that comes with it.

Estimate my project
[ Library ]
  • CLIPrivate command-line interface for scaffolding
  • SkeletonsReady-to-use project architectures
  • PackagesProven, reusable code modules
  • ComponentsReady-to-use UI primitives
  • AlgorithmsPre-coded technical building blocks
Updated every quarter · security audited
[ In detail ]

16 flagship modules, seen in detail.

A look at our core modules. Each is integrated in full, then 100% customized to your product.

Communication

Messaging

26,707lines of code ready to use

Real-time messaging, one-to-one and in groups.

Private conversations, chat lists, read states, attachments. A dense module (usually weeks of development) delivered ready to plug into your real-time back-end.

  • Conversation list, chat thread, “typing”, “recording audio”, “read / unread”, “last seen” states
  • Attachments, photos, audio, video and message actions
  • Typing indicators and read receipts
  • Pluggable into WebSocket / Firebase / your API
  • Real-time
  • Chat
  • Notifications
Mockup of the Messaging package
Implementation time and savings
From scratch
120 d
With the package
5 d
Savings−96% lead time and cost
Discovery

Scheduling & Booking

2,685lines of code ready to use

Appointment booking, without friction.

Date selection, time slots, availability, confirmation. The business module that structures any service business: from booking to planning.

  • Calendar, date and time-slot selection
  • Availability and zone management
  • “Found”, “no date”, “confirmed”, “in progress”, “upcoming”, “past” states
  • Suited to booking, scheduling, appointments
  • Booking
  • Calendar
  • Business
Mockup of the Scheduling & Booking package
Implementation time and savings
From scratch
30 d
With the package
7 d
Savings−77% lead time and cost
Transactions & content

Event & Content Detail

7,251lines of code ready to use

Rich detail pages and carousels.

Rich detail pages for events, listings or content: with a header visual, description, key information and a call to action. The clear template that showcases any content.

  • Header visual and content gallery
  • Description block, key information and tags
  • Prominent call to action (book, contact, edit, cancel)
  • Clean, readable and premium layout
  • Detail
  • Content
  • CTA
Mockup of the Event & Content Detail package
Implementation time and savings
From scratch
16 d
With the package
4 d
Savings−75% lead time and cost
Communication

Invitations

1,496lines of code ready to use

Bring the right people to the right place.

Network and group creation, smart search, internal and external invites, member management. The module that gathers your users around their groups and events, from inside the app or straight from the phone's contacts.

  • Smart search to find and invite the right profiles
  • Internal invites in one tap, accepted or declined from notifications
  • External invites by SMS or email, with a direct return into the app
  • Member management: admissions, reminders and removals
  • Groups
  • Events
  • Sharing
Mockup of the Invitations package
Implementation time and savings
From scratch
10 d
With the package
3 d
Savings−70% lead time and cost
Transactions & content

Forms

3,192lines of code ready to use

Guided input, drafts and validation.

Multi-step forms, assisted input, drafts and a summary before submission. The foundation of any data collection, built to maximize completion rates.

  • Multi-step forms with a progress bar
  • Live validation and error handling
  • Automatically saved drafts
  • Summary screen before submission
  • Input
  • Validation
  • Multi-step
Mockup of the Forms package
Implementation time and savings
From scratch
14 d
With the package
4 d
Savings−71% lead time and cost
Discovery

Map & Geolocation

1,718lines of code ready to use

Location, pins and contextual maps.

Interactive map, geolocation, points of interest and contextual cards. The module that anchors your app in the real world: shops, events or users nearby.

  • Interactive map with pins and clustering
  • Geolocation and search by area
  • Contextual card on tapping a point
  • Built-in routes and distances
  • Geolocation
  • Mapping
  • POI
Mockup of the Map & Geolocation package
Implementation time and savings
From scratch
15 d
With the package
5 d
Savings−67% lead time and cost
Community & engagement

Social & Profiles

10,205lines of code ready to use

The community heart of your app.

Profiles, news feeds, follows, interactions. Everything that turns an application into an active community and brings your users back.

  • Rich profiles, following / followers, social cards
  • News feed and interactions (like, follow)
  • “Following / not following” states and post actions
  • Built for engagement and retention
  • Feed
  • Profiles
  • Engagement
Mockup of the Social & Profiles package
Implementation time and savings
From scratch
60 d
With the package
10 d
Savings−83% lead time and cost
Community & engagement

Stories

12,480lines of code ready to use

The ephemeral format that builds a daily habit.

Stories with progress bars, auto-advance and full-screen galleries. The ephemeral format that builds habit: your users come back every day to see what they missed.

  • Progress bars and auto-advance between stories
  • Full-screen, gestural photos and videos
  • Quick reactions and replies in one tap
  • Ephemeral content that brings users back daily
  • Stories
  • Ephemeral
  • Engagement
Mockup of the Stories package
Implementation time and savings
From scratch
20 d
With the package
4 d
Savings−80% lead time and cost
Community & engagement

Reels

8,869lines of code ready to use

The vertical video that glues users to the screen.

Full-screen video reels, smooth playback and infinite vertical scrolling. The immersive format that maximizes time spent, now an essential standard of consumer apps.

  • Full-screen video playback, smooth and gestural
  • Infinite vertical scroll, built for addiction
  • Built-in reactions, sharing and comments
  • Optimized for time spent and retention
  • Video
  • Reels
  • Immersive
Mockup of the Reels package
Implementation time and savings
From scratch
20 d
With the package
4 d
Savings−80% lead time and cost
Community & engagement

Swipe & Discovery

5,436lines of code ready to use

The interaction that makes an app addictive.

The swipe-card mechanic popularized by matchmaking apps: smooth, gestural, satisfying. A premium interaction package, rarely executed well.

  • Smooth, gestural swipe cards
  • “Match” states, sharing and quick actions
  • Polished animations, high-end feel
  • Ideal for matchmaking, discovery, recommendation
  • Gestures
  • Matching
  • Premium
Mockup of the Swipe & Discovery package
Implementation time and savings
From scratch
28 d
With the package
6 d
Savings−79% lead time and cost
Communication

Notifications

1,844lines of code ready to use

The right message, at the right time.

Push, in-app, transactional emails and a notification center. The channel that brings your users back into the app, triggers action and supports retention, without ever annoying them.

  • Real-time push and in-app notifications
  • Notification center with read / unread states
  • Ready-to-use transactional email templates
  • Fine-grained preferences and quick per-notification actions
  • Push
  • In-app
  • Email
Mockup of the Notifications package
Implementation time and savings
From scratch
10 d
With the package
3 d
Savings−70% lead time and cost
Account & access

Onboarding

1,180lines of code ready to use

A first impression that converts.

Welcome screens, feature highlights and a call to action, in modern and classic styles. The very first seconds of your app: the ones that decide whether the user stays or drops off.

  • Several screen styles: modern and classic
  • Intro carousel with progress and quick skip
  • Showcase of your key features
  • “Get started” and “Sign in” calls to action, ready to go
  • Intro
  • Tutorial
  • Conversion
Mockup of the Onboarding package
Implementation time and savings
From scratch
3 d
With the package
1 d
Savings−67% lead time and cost
Account & access

System Permissions

824lines of code ready to use

Permissions, requested at the right moment.

System permission requests (notifications, camera, microphone, location) in modern and classic styles. The delicate moment when the user accepts (or declines): polished screens that explain the purpose and maximize the opt-in rate.

  • Notification, camera, microphone and location permission requests
  • Explanation screens before the native prompt
  • Modern and classic styles to choose from
  • Denial handling and redirect to settings
  • Permissions
  • System
  • Trust
Mockup of the System Permissions package
Implementation time and savings
From scratch
3 d
With the package
1 d
Savings−67% lead time and cost
Account & access

Sign-up

742lines of code ready to use

Create an account, without friction.

The entire account-creation flow, industrialized: sign-up method, email or phone, SMS code, password, terms of use. Your users' first impression, the one that decides whether they make it to the end.

  • Sign-up by email, phone and SMS code (OTP)
  • Password choice and strength rules
  • Terms acceptance and consents handled
  • Error, validation and success screens, ready to go
  • Security
  • OTP
  • Onboarding
Mockup of the Sign-up package
Implementation time and savings
From scratch
5 d
With the package
2 d
Savings−60% lead time and cost
Account & access

Sign-in

584lines of code ready to use

Sign back in within seconds.

The returning-user flow, industrialized: sign-in by identifier, forgotten password, reset and secure sessions. The invisible foundation that protects accounts without slowing down your loyal users.

  • Sign-in by email, phone and SMS code (OTP)
  • Guided forgotten-password and reset flows
  • Secure sessions and automatic re-login
  • Compliant with enterprise security requirements
  • Security
  • Sessions
  • OTP
Mockup of the Sign-in package
Implementation time and savings
From scratch
10 d
With the package
2 d
Savings−80% lead time and cost
Account & access

Settings & Account

2,019lines of code ready to use

The detail that proves everything's covered.

Settings, profile, subscription, preferences, account completion. The “invisible” part that's often neglected and that makes the difference between a prototype and a real product.

  • Complete settings, profile and preferences
  • Profile completion and subscription management
  • Screen variants, ready to go
  • Consistent with the rest of your packages
  • Account
  • Settings
  • Profile
Mockup of the Settings & Account package
Implementation time and savings
From scratch
10 d
With the package
3 d
Savings−70% lead time and cost
[ The full catalog ]

And plenty more modules, ready to customize and integrate.

Beyond our flagship packages, our library covers most of what a modern application needs. Filter by domain.

  • Mockup of the Payments & Security package
    Transactions & content

    Payments & Security

    Payment methods and account security.

    • Payment
    • Security
  • Mockup of the Groups & Rooms package
    Communication

    Groups & Rooms

    Discussion spaces and moderation.

    • Groups
    • Moderation
  • Mockup of the Hours & Availability package
    Discovery

    Hours & Availability

    Time slots and service areas.

    • Hours
    • Areas
  • Mockup of the Reporting & Moderation package
    Transactions & content

    Reporting & Moderation

    Moderation and reporting, cleanly handled.

    • Moderation
    • Trust
  • Mockup of the Profile creation package
    Account & access

    Profile creation

    Complete profiles in a few steps.

    • Profile
    • Onboarding
  • Mockup of the Professional profile package
    Account & access

    Professional profile

    Verified, detailed pro accounts.

    • Pro
    • Verification
  • Mockup of the Ratings package
    Community & engagement

    Ratings

    Ratings, reviews and stars, ready to use.

    • Reviews
    • Ratings
  • Mockup of the Subscription package
    Transactions & content

    Subscription

    Plans, tiers and premium conversion.

    • Paywall
    • Monetization
  • Mockup of the Search package
    Discovery

    Search

    Smart search, sorting and filters.

    • Search
    • Filters
  • Mockup of the Referral package
    Communication

    Referral

    Turn your users into ambassadors.

    • Referral
    • Growth
  • Mockup of the Internet Check package
    Account & access

    Internet Check

    The lost-connection screen, already handled.

    • Offline
    • Network
  • Mockup of the KYB / KYC package
    Account & access

    KYB / KYC

    Account authenticity verification.

    • Pro
    • Verification

And many more…

This list isn't exhaustive. Our module catalog evolves continuously. If the one you're looking for isn't here, it may already be available and can be integrated into your project.

[ Team ]

Entrust your project
to our app experts.

Our experts in web, mobile and AI applications build your project, delivering superior technical and functional quality within shorter timeframes.

Kosmos team — portrait 1
Kosmos team — portrait 2
Kosmos team — portrait 3
Kosmos team — portrait 4
Kosmos team — portrait 5
Kosmos team — portrait 7
Kosmos team — portrait 6
15
Experts
100+
Projects delivered
78%
Loyal clients
4.9/5
Average rating
Learn moreRequest a quote
[ Tech Stack ]

The best technologies for your application.

We master the best services and technologies to develop, maintain and scale your mobile application.

Let's discuss your projectRequest a quote

Innovation Tax Credit

Naxan Group is CII-accredited: your company can claim a tax credit on the outsourced costs of developing a solution that is new and innovative in its reference market.

20%of outsourced development costs

Bpifrance expert

Kosmos works within the “Diag Axes d'Innovation” programme: we help SMEs and mid-caps identify their innovation paths and assess the feasibility of their projects, upstream.

50%of the diagnostic subsidised by Bpifrance

[ Anniversary ]

8 years of innovation,
by your side.

8 years of passion, boldness and innovation! Projects, challenges and successes. All thanks to you.

Since
2018
Years
08
THANK YOU!
[ Press ]

They talk about us.

Explore the mentions and analyses that spotlight our work and our innovations across the business and tech press.

Free quote · no commitment

Let's discuss your application project.

Describe your project. Our team replies within 24 hours with free technical scoping, along with a clear estimate of costs and timelines. No commitment.

  • Reply within 24 hours from a project manager
    or engineer.
  • Technical scoping and quote, with no fees.
  • No commitment, your data stays
    confidential.
Quick estimate

Free scoping & estimate in less than 24h

Describe your project and we'll get back to you with a costed estimate and a roadmap.

Request
Call us
01 76 50 66 44
Monday to Saturday, 9 AM to 6:30 PM
Get a callbackContact us