Best Fit Firearm · AI Hand Scan

Discover Your Perfect Fit With AI-Powered Precision

It's like having an expert in your pocket. Scan your hand and get personalized gun recommendations using AI — tailored to your grip length, trigger reach, and unique hand profile.

Quick Fit & Custom Fit
iPhone & iPad
6,000+ Handguns
130+ Manufacturers

Build an app like this More work

4.4★: App Store
6,000+: Handguns
130+: Brands

4.4★App Store

6,000+Handguns

One app to scan your hand and find your perfect firearm fit — built and shipped by Exarth.

4.4★App Store rating

6,000+Handguns

130+Manufacturers

iOSiPhone & iPad

Overview

A complete AI fit platform, from scan to match

Quick Fit and Custom Fit hand scanning, AI analysis, personalized recommendations, and firearm exploration — on iPhone and iPad in one seamless experience that turns a simple coin-reference scan into your ideal handgun match.

Coin-reference scan
AI best-fit match
6,000+ handguns

1Scan your hand with a coin for reference.
2Let AI analyze grip length & trigger reach.
3Find your fit across 6,000+ handguns.

View on the App Store

Coin scan

Perfect fit

Fit toolkit

AI hand scanningPlace a coin in your palm and let AI capture grip length, trigger reach & hand dimensions.

Personalized matchingTailored handgun suggestions from 6,000+ models matched to your unique hand profile.

130+ manufacturersExplore a comprehensive catalog, compare specs, and save favorites with confidence.

Challenge & solution

From guesswork to perfect fit

AI

Precise hand scanning

6,000+

Handguns to match

The challenge

The Challenge

Finding the perfect firearm fit has always been a challenge. Traditional methods rely on trial and error, making it difficult to find a gun that matches your unique hand dimensions. Without proper fit, comfort, precision, and safety are compromised.

Trial-and-error firearm shopping
Poor fit affecting comfort & safety
No data-driven fit guidance

Fit by feelGuessworkNo scan dataWrong size

Fitting

Trial & error

Grip

Mismatch

Methods

Old & manual

0Scan data
HighMismatch risk
ManualSizing

Traditional methods · No precise fit data

The solution

The Solution

GR1P AI revolutionizes how shooters find their perfect fit. Using advanced AI and a simple coin-reference hand scan, the app captures grip length, trigger reach, and hand dimensions to recommend the ideal handgun from over 6,000 models across 130+ manufacturers.

AI-powered hand measurement
Personalized firearm recommendations
6,000+ handguns · 130+ manufacturers

GR1POne app

Hand ScanAI MatchExplorePerfect Fit

One app · Scan to perfect fit

GR1P AI · Key features

Your perfect fit, powered by AI

From a simple coin-reference hand scan to personalized firearm recommendations — GR1P AI makes finding the right handgun fit simple, accurate, and data-driven.

01/06 features

Tap a feature to preview it

Technology

Built on a modern, proven stack

A scalable, type-safe foundation powering GR1P AI — from coin-reference hand scanning and AI matching to a 6,000+ handgun catalog and cloud infrastructure.

Chosen for

Speed

Optimised for fast, responsive apps.

Security

Hardened with best-practice defaults.

Scalability

Grows with your users and team.

Maintainability

Clean, documented, easy to extend.

01

Mobile

3 tools

Native iPhone & iPad experience.

iOS
Swift
iPadOS

One codebase scaling from iPhone to iPad.

02

Scanning & AI

3 tools

Coin-reference scan & best-fit matching.

Vision AI
ARKit
ML matching

Vision-based hand scans with AI fit matching.

03

Backend & Data

3 tools

Catalog, accounts & subscriptions.

Node.js
PostgreSQL
StoreKit

Type-safe services backing 6,000+ handguns.

04

Cloud & DevOps

3 tools

Scalable hosting & automated delivery.

AWS
Docker
CI/CD

Auto-scaling cloud infra with CI/CD pipelines.

GR1P AI

Key Mobile Screens

Core GR1P AI flows — onboarding, coin-reference hand scanning, AI recommendations, favorites, and Ultimate Access on iPhone & iPad.

Splash

Philosophy

UX & Design Approach

A precision-first design philosophy that prioritizes accuracy, simplicity, and user confidence — combining AI hand scanning with a comprehensive firearm database.

PrecisionAccuracySimplicityMobile-first

Design pillars: 04
Accessibility: AA
App Store: 4.4★

Audience: Shooters & buyers
Platforms: iPhone & iPad
Catalog: 6,000+ handguns
Accessibility: WCAG AA

Every screen is shaped around real shooters — precision first, a simple guided scan, and fit recommendations you can trust from one quick coin scan.

Pillar 01
AI-Powered Precision
AIPinpoint scans
Advanced hand scanning technology analyzes your grip length, trigger reach, and hand dimensions with pinpoint accuracy.
Accurate fit analysis from one quick coin scan.
AI scanning
Pillar 02
Simple 4-Step Process
4Guided steps
From hand scan to perfect-fit recommendation, the journey is straightforward and user-friendly.
Anyone reaches their fit in four clear steps.
Guided flow
Pillar 03
Comprehensive Database
130+Manufacturers
Explore over 6,000 handguns from 130+ top manufacturers with detailed specifications and fit analysis.
Confident comparisons across the full catalog.
6,000+ guns
Pillar 04
Privacy & Safety First
100%Your data
Your data belongs to you. We prioritize privacy and safety above all else, ensuring your information is always protected.
Scan data stays private and protected, always.
Privacy