DevCasp

Hello World

I’m DevCasp • a full stack developer who devs iOS apps, games, emulators, and tools. This site is my portfolio and a place where I share what I’ve been working on, the lessons I learn while deving products, and the music I make on the side. I also work with youtubers.

Find Me

About

Who I Am

I’m a full-stack developer focused on mobile and game development. Most of my work lives on iOS • from utility apps and wallpapers to full games and multi system emulators. I also release the occasional Steam title and started as a web dev.

I started programming things after dropping out of high school and made youtube videos on a channel with over 10,000 subs where I shared videos about programming, ios tutorials, pc and mac tutorials, and gaming content.

Outside of apps I own a card shop named cool finds, make music, appear in the occasional video, and keep open-sourcing pieces of my work so others can learn from it. This site is the central place for everything I release.

Skills & Tools

Swift • obj-c++
UIKit • SwiftUI
Unity • c++
Python • Bash
html • css • jquery • php • nodejs
Emulation
App Architecture
UI / UX

Projects

GBDev

GBDev • Multi Emulator

GB • GBA • SNES • DS • 3DS

A multi-system emulator focused on performance and a clean interface for playing classic handheld and console games on modern devices.

iOS
iPA Spot

iPA Spot

Sideloading tools & resources

A curated place for legitimate IPA distribution and related tools aimed at developers and testers who need flexible installation options.

iOS
EonHub

EonHub

Modded iOS App Store experience

An alternative distribution platform that lets users discover and install apps outside the standard App Store flow, with a focus on community and customization.

iOS
Chroma Hue

Chroma Hue

Custom Halo Wallpapers

Create and apply custom Halo-inspired wallpapers with color controls and export options. Built for fans who want their lock screen to match their style.

iOS
8bit Survival

8bit Survival

Retro Style Shooter

A fast-paced 8-bit inspired survival shooter with simple controls, escalating difficulty, and that classic arcade feel on mobile.

iOS
Blokie

It's Me, Blokie.

Hell-Themed Puzzle Game

A dark, atmospheric puzzle game centered around Blokie. Short levels, satisfying mechanics, and a strong visual identity.

iOS
Cubic Dweller

Cubic Dweller

My First Game

The project that started it all. Available on Steam and iOS, Cubic Dweller taught me how to finish and release a semi-complete game from concept to store.

Steam iOS

Code Snippets

Tap a cell to expand the full project. Every example includes every file required and a detailed write-up.

GML Heart System
GameMaker Language
SwiftUI Custom Tab Bar
Swift / SwiftUI
AdMob Banner Ads
SwiftUI + AdMob
Theos Alert + Follow
Theos / Logos
SwiftUI Glass Card
Swift / SwiftUI
Intersection Observer
JavaScript
CSS Glass Panel
CSS

GML Heart System — Full Setup

This is a complete health system for GameMaker Studio 2 / GameMaker Studio. It tracks maximum health and current health, draws a row of hearts in the GUI layer, and provides a reusable function that any object can call when the player takes damage.

You need two sprites:

Create an object called obj_player. Put the Create Event code and the Draw GUI Event code inside it. Create a script called scr_take_damage. Whenever anything should hurt the player, call scr_take_damage(1). When health reaches zero the room restarts.

obj_player — Create Event
Create Event
max_hp = 5;
hp = max_hp;
Script — scr_take_damage
scr_take_damage
function scr_take_damage(amount) {
    with (obj_player) {
        hp -= amount;
        if (hp <= 0) {
            hp = 0;
            room_restart();
        }
    }
}
obj_player — Draw GUI Event
Draw GUI Event
for (var i = 0; i < max_hp; i++) {
    var xx = 20 + (i * 28);
    var yy = 20;
    if (i < hp) {
        draw_sprite(spr_heart_full, 0, xx, yy);
    } else {
        draw_sprite(spr_heart_empty, 0, xx, yy);
    }
}

SwiftUI Custom Tab Bar

This replaces Apple’s TabView with a custom floating tab bar. It uses a binding for the selected index, spring animation, and ultraThinMaterial for the glass look. Works on iOS 15+.

CustomTabBar.swift
CustomTabBar.swift
import SwiftUI

struct CustomTabBar: View {
    @Binding var selected: Int
    let tabs = ["house.fill", "gamecontroller.fill", "person.fill"]
    let labels = ["Home", "Games", "Profile"]

    var body: some View {
        HStack {
            ForEach(0..
ContentView.swift
ContentView.swift
import SwiftUI

struct ContentView: View {
    @State private var tab = 0

    var body: some View {
        ZStack(alignment: .bottom) {
            Group {
                switch tab {
                case 0:
                    HomeView()
                case 1:
                    GamesView()
                default:
                    ProfileView()
                }
            }
            .frame(maxWidth: .infinity, maxHeight: .infinity)

            CustomTabBar(selected: $tab)
        }
        .ignoresSafeArea(.keyboard)
    }
}

struct HomeView: View {
    var body: some View {
        Text("Home")
            .frame(maxWidth: .infinity, maxHeight: .infinity)
            .background(Color.black)
    }
}

struct GamesView: View {
    var body: some View {
        Text("Games")
            .frame(maxWidth: .infinity, maxHeight: .infinity)
            .background(Color.black)
    }
}

struct ProfileView: View {
    var body: some View {
        Text("Profile")
            .frame(maxWidth: .infinity, maxHeight: .infinity)
            .background(Color.black)
    }
}

Google AdMob Banner Ads in SwiftUI — Full Setup

Complete production-ready banner implementation using the official Google Mobile Ads SDK wrapped for SwiftUI. Add the SDK via SPM, put your App ID in Info.plist, and replace the test unit ID with your own.

YourApp.swift
YourApp.swift
import SwiftUI
import GoogleMobileAds

@main
struct YourApp: App {
    init() {
        MobileAds.shared.start(completionHandler: nil)
    }

    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}
BannerAdView.swift
BannerAdView.swift
import SwiftUI
import GoogleMobileAds

struct BannerAdView: UIViewRepresentable {
    let adUnitID: String

    func makeUIView(context: Context) -> BannerView {
        let banner = BannerView(adSize: AdSizeBanner)
        banner.adUnitID = adUnitID
        banner.rootViewController = UIApplication.shared.connectedScenes
            .compactMap { $0 as? UIWindowScene }
            .flatMap { $0.windows }
            .first { $0.isKeyWindow }?
            .rootViewController
        banner.load(Request())
        return banner
    }

    func updateUIView(_ uiView: BannerView, context: Context) {}
}
ContentView.swift (usage)
ContentView.swift
import SwiftUI

struct ContentView: View {
    var body: some View {
        VStack(spacing: 0) {
            Spacer()
            Text("Your App Content")
                .foregroundColor(.white)
            Spacer()

            BannerAdView(adUnitID: "ca-app-pub-3940256099942544/2934735716")
                .frame(height: 50)
        }
        .background(Color.black)
        .ignoresSafeArea(edges: .bottom)
    }
}

Theos Tweak — Alert with Follow Button

Complete Theos tweak that shows a UIAlertController with a Follow button. Uses NSUserDefaults so it only appears once. Change the filter and the X URL as needed.

Tweak.x
Tweak.x
#import 

%hook SpringBoard

- (void)applicationDidFinishLaunching:(id)application {
    %orig;

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    if (![defaults boolForKey:@"DevCaspAlertShown"]) {
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            UIAlertController *alert = [UIAlertController
                alertControllerWithTitle:@"Hey"
                message:@"Follow me on X for more tweaks and projects"
                preferredStyle:UIAlertControllerStyleAlert];

            UIAlertAction *follow = [UIAlertAction
                actionWithTitle:@"Follow"
                style:UIAlertActionStyleDefault
                handler:^(UIAlertAction *action) {
                    NSURL *url = [NSURL URLWithString:@"https://x.com/devcasp"];
                    [[UIApplication sharedApplication] openURL:url options:@{} completionHandler:nil];
                }];

            UIAlertAction *dismiss = [UIAlertAction
                actionWithTitle:@"Later"
                style:UIAlertActionStyleCancel
                handler:nil];

            [alert addAction:follow];
            [alert addAction:dismiss];

            UIWindow *window = [UIApplication sharedApplication].keyWindow;
            [window.rootViewController presentViewController:alert animated:YES completion:nil];

            [defaults setBool:YES forKey:@"DevCaspAlertShown"];
            [defaults synchronize];
        });
    }
}

%end
Makefile
Makefile
TARGET := iphone:clang:latest:14.0
INSTALL_TARGET_PROCESSES = SpringBoard

include $(THEOS)/makefiles/common.mk

TWEAK_NAME = DevCaspAlert

DevCaspAlert_FILES = Tweak.x
DevCaspAlert_CFLAGS = -fobjc-arc
DevCaspAlert_FRAMEWORKS = UIKit

include $(THEOS_MAKE_PATH)/tweak.mk
control
control
Package: com.devcasp.alert
Name: DevCasp Alert
Depends: mobilesubstrate
Version: 1.0.0
Architecture: iphoneos-arm
Description: Shows an alert with a follow button
Maintainer: DevCasp
Author: DevCasp
Section: Tweaks

SwiftUI Glass Card — Complete Component

Reusable glass-style card using ultraThinMaterial and a red stroke. Drop it into any SwiftUI file.

GlassCard.swift
GlassCard.swift
import SwiftUI

struct GlassCard: View {
    let title: String
    let subtitle: String

    var body: some View {
        VStack(alignment: .leading, spacing: 8) {
            Text(title)
                .font(.headline)
                .foregroundColor(.red)
            Text(subtitle)
                .font(.subheadline)
                .foregroundColor(.white.opacity(0.8))
        }
        .padding()
        .frame(maxWidth: .infinity, alignment: .leading)
        .background(.ultraThinMaterial)
        .cornerRadius(16)
        .overlay(
            RoundedRectangle(cornerRadius: 16)
                .stroke(Color.red.opacity(0.3), lineWidth: 1)
        )
    }
}

Intersection Observer — Full Fade-In System

The same pattern used on this site. Elements start invisible and animate when they enter the viewport.

observer.js
observer.js
const observer = new IntersectionObserver(entries => {
  entries.forEach(entry => {
    if (entry.isIntersecting) {
      entry.target.classList.add('animate__animated', 'animate__fadeInRight');
      observer.unobserve(entry.target);
    }
  });
}, { threshold: 0.15 });

document.querySelectorAll('.animate-on-scroll')
  .forEach(el => observer.observe(el));

CSS Glass Panel — Complete Style

The exact glass treatment used throughout this site.

glass.css
glass.css
.glass-panel {
  background: rgba(12, 0, 0, 0.58);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 50, 50, 0.3);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  color: #fff;
}

Music

Other Work

Cameos & Appearances

bin laden hard drive • tuv "hacker" • iamlucid

Open Source & Older Projects

ManaBoxPro • Source MovieHub • Source GitHub • @imdevcasp

I occasionally release source for older experiments so other developers can study the code or build on top of it. More on my GitHub: @imdevcasp

Copyright 2026 casp.dev • by DevCasp