Native and cross-platform mobile apps for iOS and Android
High-quality iOS, Android, and cross-platform apps — engineered by senior mobile teams. AI features (agents, copilots, voice, computer vision) baked in when your roadmap calls for them.
Native iOS
Native Android
React Native
Project Approaches
Mobile-only
Full workflow of your iOS and Android apps — or embedded into your in-house mobile team. AI features included when you need them, skipped when you don’t.
Mobile + back-end
Mobile apps plus the back-end that powers them — APIs, databases, and (when needed) AI pipelines, agent runtimes, observability. One team, one stack.
Web companion
A web companion app alongside your mobile experience — built by our front-end team, shipped on the same release cadence.
Admin panel & ops tooling
Internal admin panels, ops dashboards, and content management for the teams behind your mobile product. AI eval and review tooling available when applicable.
Technical stack
Mobile
Swift
Java
React Native
Kotlin
Flutter
Objective C
Backend
Node.js
Nest.js
Express
PHP
Python
ASP.NET
Django
Flask
Ruby on Rails
Sinatra
C#
Symfony
Laravel
Yii
Go
Erlang
C/C++
Scala
Rust
Julia
R
AI
OpenAI GPT
Llama
Anthropic
Gemini
Hugging Face
Tensorflow
PyTorch
OpenCV
DeepSeek
Qwen
LangChain
LangGraph
DevOps
Docker
Kubernetes
AWS
Azure
Google Cloud
ElasticSearch
Apache Kafka
QA
Selenium
Appium
Cypress
JUnit
pytest
RSpec
PHPUnit
Mocha
Jest
JMeter
OWASP ZAP
Don’t see the tech stack you are looking for?
Our team has experience finding candidates for custom requirements and various tech stacks. Please contact us, and let’s find you a perfect candidate.
Our engineers developed products for
Project Stages and Flow
We run every project through Production-Ready AI Engineering — senior engineers and AI agents in the same delivery loop, with evals and human review built in.
Initial stage
We ensure your project’s success with careful planning. During the initial stage, we collaborate with you to align functionality, performance, and design. We define strategy, set priorities, and establish your budget and deadlines before starting work.
Design stage
After developing a prototype wireframe, our design team starts to create your application style (the app’s “look and feel”). In this stage, we provide you with a full set of UI screens to use for further development.
Development stage
Product development progresses through multiple releases, including an MVP. We use Agile sprints to speed up the process, running development alongside wireframes, documentation, and mockups.
Ongoing development, support, and maintenance stage
After releasing the MVP, our team performs new sprints to speed new releases with additional functionality. And we support and maintain the latest version of the launched app.
Development Formats and Billing
Monthly Team Allocation
The best products require experimentation and iteration. With Monthly Team Allocation, you reserve a dedicated squad. You get:
- A senior team that’s always yours, never reassigned mid-project
- Scope and priorities you can flex sprint by sprint
- Predictable monthly spend with no padding for risks you may never use
- Velocity from a team that already knows your codebase
Agile
We believe in Agile development. Agile front-end development involves the use of a series of short sprints, which allow for quick and transparent progress in your project. We apply our nimble and responsive ideologies to each front-end project. Rather than relying on the restrictive linear Waterfall approach, Agile ensures we can provide a flexible service resulting in a custom front-end solution, which earns your approval at every stage.
We offer 2 approaches
to developing your project
Project
development
Project development provides a fully dedicated team to bring your vision to life, ensuring seamless delivery and alignment with your goals.
Benefits of Working with Diffco
Senior teams, no junior bench
Senior engineers from day one. The engineer who scopes the work is the engineer who ships it.
Streamlined Development Process
Agile project management will keep you in the loop, providing useful feedback during every iteration of your project.
Transparent Billing
You will always know what to expect and never face any surprises in the billing department. Understand your charges, both what you’re paying for and why.
Clear Communication and Detailed Reporting
From the moment we first connect to the moment we deliver exactly what you need, you’ll have all the information you need to keep your finger on the pulse of your project.
Success stories of our clients
We’ve developed a platform where players can earn bonuses by playing top mobile games
We developed an iOS app for socializing with like-minded people by participating in engaging events
We’ve developed an Android mobile app for a quick groceries delivery service
We’ve developed an audio marketing platform with intelligent advertisements
We were impressed by Diffco’s approach to the development process and how they engineer new solutions.
We built an AI moderator that runs automated user research interviews at scale
We’ve introduced computer vision technology for easy ID and DL recognition for car rental services
We’ve developed an AI-powered app to create stunning in-home newborn photography
We’ve created AI technology that makes everyone a movie star
We’ve built an AI app that allows anyone to choose a restaurant like a food expert
We developed a social media platform for pets and their owners
We’ve implemented an excellent technology of sound transmission over WiFi
We’ve created an app that turns your device into a child monitoring system in your car
We’ve developed a platform where players can earn bonuses by playing top mobile games
We developed an iOS app for socializing with like-minded people by participating in engaging events
Explore our
amazing case studies
Frequently Asked Questions
Frequently Asked Questions
What is custom mobile app development?
Custom mobile app development is building iOS and Android apps tailored to your business — from focused MVPs to large multi-platform products. At Diffco we build for both: classic mobile experiences (e-commerce, marketplace, messaging, productivity) and AI-native apps with agents, copilots, voice, or computer vision baked in.
How much does it cost to create a custom mobile application?
The costs of any mobile application development project are variable. The exact amount you’ll pay to develop a custom app will depends on the features, functionality, and level of support you may need. The more advanced the app, the more you’re likely to pay for custom guidance and expertise. At Diffco, we offer a transparent pricing structure to eliminate the confusion and complexities of planning your budget. Our outsourced custom app development prices are based on the “Time and Materials” approach. This means we charge our clients according to the specific resources they need, and the time it takes to produce, maintain, and manage the app. We believe this is the best way to price custom app development for projects, because the best mobile apps often require flexible thinking, regular tweaks, and shifts in scope. With our quotes, you don’t pay for contingencies and extra features you don’t need either. See why Diffco is a trusted mobile application development company today.
How long does custom mobile application development take?
The time scale involved in developing a custom app can also differ based on a range of factors. Once again, the complexity of your application will usually determine how long it takes to create. Simple apps can be built in just 1-2 months, while others take several months to create. No matter how advanced your custom app might be, working with Diffco will ensure you can take a viable product to market asap. At Diffco, we use an agile development process to design your solution as quickly as possible. We apply a nimble and responsive approach to incorporate your feedback during the development process, and adjust priorities as needed. Our agile approach means we can create a minimum viable product (MVP) for your app as quickly as possible before rolling out additional features and capabilities to improve the user experience.
What devices do you build custom apps for?
Our custom mobile app development services are suitable for all kinds of mobile applications. Our experienced team can fully develop, manage, and maintain apps for both iOS (Apple), Android, tablets, and various mobile devices. We can also work with your team on a joint development effort for a specific platform. Throughout our development process, we follow best practices and industry guidelines to ensure the architecture of your app remains clean and compliant. Our teams are committed to ensuring good documentation, code readability, and design principles. We also follow principles pre-established by Google (such as style guides for Java, JavaScript, Typescript and Kotlin) and Apple (Swift and Objective-C) guides to ensure your app is more likely to be approved by your chosen app store.
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Let’s build something
great together.
Need other services?
Team Augmentation
We provide engineers or teams tailored to your project, ensuring skill and compatibility with your goals and culture. They will collaborate with you closely, infusing fresh energy and ideas.
Back-end Development
We are experienced in high-load and complex backend infrastructure development for mobile or web apps and enterprise services.
Web Development
Our developers can create web solutions that are tailored to your needs, easy to manage with popular CMS, and which can be seamlessly integrated with your existing internal systems.
Front-end development
We are experienced in building modular, high-performance web applications for corporate clients and startups. We utilize modern and robust technology stacks.
