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Custom App and Software Development

From startup MVPs to enterprise platforms, we build mobile apps, web applications and business software, with AI features built in when they help.

Great software starts with understanding how your business works. We design and build applications that fit your process, your customers and your goals, then keep improving them after launch.

Our teams build iOS and Android apps, web applications, customer portals, internal tools and integrations. We use modern frameworks and cloud infrastructure, and we can add AI features such as smart search, assistants and automation to make your product stand out.

What is included

  • Mobile apps for iOS and Android (native and cross-platform)
  • Web applications, SaaS platforms and customer portals
  • Internal tools, dashboards and workflow software
  • API development and third-party integrations
  • AI features: assistants, smart search and recommendations
  • App Store publishing, maintenance and support

Why companies choose Errocks

Built around you

Software shaped to your workflow, not a generic tool you have to work around.

Launch in stages

Start with an MVP, learn from real users and grow with confidence.

AI-ready

We design products so intelligent features can be added now or later.

Our process

  1. Discovery and strategy. We learn your goals, systems and constraints, then agree on the use case, scope, timeline and a clear quote.
  2. Prototype fast. You see a working proof of concept early, so decisions are based on real results instead of slide decks.
  3. Build and integrate. We build in stages, connect to your existing tools and data, and test thoroughly with your team.
  4. Launch, monitor, improve. We deploy, train your people, track performance and keep improving as your business and the technology evolve.

Custom App & Software Development FAQs

How much does it cost to build an app?
It depends on features, platforms and integrations. After a short discovery call we provide a clear written estimate with no hidden costs.
Should I build for iOS, Android, or both?
We recommend based on your audience and budget. Cross-platform development often lets you launch on both with one codebase.
Can you modernize or extend our existing software?
Yes. We review what you have, advise honestly and then upgrade, integrate or rebuild the parts that need it.
Who owns the code?
You do. When the work is paid for, the code and assets are yours.

Related services

AI Development & Integration

Custom generative AI and machine learning solutions built into your business.

Cloud & DevOps Services

Cloud migration, infrastructure, automation and reliable deployments.

IT Staffing & Staff Augmentation

Skilled developers, AI engineers and IT professionals on flexible terms.

Ready to Talk About Custom App & Software Development?

Tell us what you need and get a free, no-obligation consultation from our New York team.

Get a Free ConsultationCall (917) 719-0617