We rebuilt First Line's field guide app for first responders
We started with a full technical review of the old app, then built the new Decon Field Guide.

Needham, MA · just outside Boston · since 2015Needham, just outside Boston
Full-time US engineers build your iPhone and Android app.
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Book a free call
30 minutes with Pete Whiting, head of sales. You leave knowing whether our paid planning step is right for you.
The number we quote is the number you pay. Any overage is on us.
The software works the way we agreed, or we fix it.
For 12 months after launch, we fix any code that doesn't work the way we agreed, at no charge.
Most builds cost $150,000 to $300,000. Larger products cost more.
Case studies
We started with a full technical review of the old app, then built the new Decon Field Guide.

Conformis makes custom knee and hip implants in Billerica, MA. Surgeons sign in through Conformis's own ordering platform to see each patient's plan. The app is approved in the App Store and Google Play.

Our engineers built the app with Ollie's team. Customers manage their plans and check their dog's digestion, weight and dental health.

We built the app, then handed it to SystemOne's own engineers.

Phone renders use the 3D model “Phone 17 Pro Max” by Ranguel on Sketchfab, licensed CC BY 4.0 (creativecommons.org/licenses/by/4.0), modified with our client app screens.
Step 1 · Discovery and Design
We map who uses your app, what they need it to do, and whether you need one app for both phones or two apps. You get a guaranteed build price, whether or not you build with us. Discovery and Design costs $15,000 to $30,000.
Step 2 · Build
The build is split into milestones, each at a fixed price agreed before we start. Anything you add beyond the plan gets its own price.
Step 3 · Launch
We take your app through review for the App Store, Google Play or both. You get the code, its tests and written notes. Then the 12-month warranty starts.
Verified reviews
We weren't just a project to them. Even now, they catch up and ask how the app is running, and not from a sales standpoint. They really care about our end-users.
Our engineering team spent a fraction of their time (from many hours per week down to < 1 hour per week) supporting API customers.
Since Gnar started working with the AARP Foundation Property Tax-Aide, these digital tools have helped over 28,000 people apply for and, if eligible, obtain over $10M in property tax relief.
Work was accurately estimated and completed within the timeframes planned.
…they help make important business decisions; they acknowledge what I want to do but also help me understand the alternatives we have. In a nutshell, their thoughtfulness and communication have blown me away.
Our system is quite complicated, and Gnar was really able to be productive quickly without a lot of ramping up.
Delivery was on time and the team was responsive and professional during the entire process with weekly checkin meetings.
From the first conversation, Pete and Mike were open and curious about our project and, more importantly, about our company and how this project helped us help our clients.
…they offered out great ideas, more efficient ways things could be done if applicable and were cost conscious. I would recommend them to anyone.
They care about the quality of their work, and the satisfaction of their clients. They take the time to understand what you are trying to achieve.
I would describe the engagement as highly successful.
They were really great partners, not only in getting the work done but also in helping us drive the software in the right direction.
I very rarely have to over-prescribe the work, Alex does a great job of listening to stakeholders which requires less work for me to best define a solution.
We like that they are a small, nimble company like we are, and that they are invested in our success.
It was always easy to work with the company founders, who went out of their way to meet our needs
The team also responds to pivots in priority very well and are willing to dig into problems with you to make sure the solution is right.
Future clients should trust them and take advantage of their extensive knowledge and expertise.
They did a good job of jumping in and learning the in's and out's of the application quickly to begin building right away.
Creative, timely, flexible, organized, personable, and strong technical skills.
They were able to advise us on good long-term approaches and strategies for frontend development.
Companies with over $10 million a year in revenue.
Most builds cost $150,000 to $300,000. Larger products cost more. Discovery comes first: 2 to 6 weeks and $15,000 to $30,000.
Native means two apps, Swift for iPhone and Kotlin for Android. React Native means one app for both phones. Discovery helps you pick before you commit.
No. Discovery ends in a guaranteed price, whether or not you build with us.
Yes. We connect apps to CRMs, ERPs, payment processors and sign-in systems.
Hosting, monitoring, support, and the same person who built it.
Often they should. If your engineers have the capacity and the direction, do it internally. We will say so on the call.
30 minutes with Pete Whiting, our head of sales. You leave knowing whether our paid planning step is right for you.
Book a free call
30 minutes with Pete Whiting.