Icelus vs Swoop

Icelus is a design tool for screens. Design on a real canvas; underneath, every screen is text. Pick a part, tap the canvas, and it lands there as a real button, field, switch or table. One switch in Settings shows the same screen as box-drawing characters. Buttons, inputs, tables, date pickers, tab bars, charts, 38 parts in all. Draw arrows between them, add a big title, and move things around until the screen looks right. Or type the whole screen in a few lines and let Icelus draw it. Then copy it. A Icelus screen is text underneath, so it pastes into a pull request, an issue, a README, a chat or a code comment, and it stays editable wherever it lands. No image to attach, no design file to open. What you get: - A real canvas: parts draw as real controls on artboards, with a Settings switch for the text look - Brush, eraser, selections, gradients, 16 terminal colors, adjustment layers and masks - 38 parts, each its own object you can move, resize, duplicate and reorder - Several screens on one canvas, linked by arrows, copied as one document - Screen templates: sign in, settings, list, detail, empty state - Highlights, your own saved parts, and iOS, Material, terminal and email packs - Copy HTML: the layout as real elements for a developer - Paste any text wireframe and edit it - Shortcuts: Draw a screen, Make plain ASCII - 27 languages and full VoiceOver support - Arrows that stay attached when parts move - Type a screen in a few lines, and copy any sketch back as those lines - Turn a photo into block art, or trace over one - Text boxes, banners and five box styles - Tables you edit as typed rows, with columns that grow - Bar charts, sparklines and progress rows drawn from numbers - Flowcharts from a line like a -> b -> c - Sequence diagrams from lines like User -> App: Sign in - Trees from an indented list - Groups that move as one - A layer list: hide, lock, reorder - Symbols: edit one copy, every copy follows - Pressed, disabled and error states - Snap and alignment guides - Copy as text, Markdown or plain ASCII, or share an image - Autosave and 50 steps of undo - Keyboard control on the Mac - The same project file on iPhone, iPad, Mac, Apple Watch and the web Everything stays on your device. An account is optional, and nothing you draw is uploaded. No tracking. One price, no subscription. The web version at icelus.jaybulb.com is free.

Write SwiftUI on your phone, watch it run, and paste it into Xcode. Swoop is a canvas for postcard-sized components. Type one, press play, and it runs for real — springs, timing and trigonometry computed on the device at the frame rate you feel. Copy hands back plain SwiftUI that compiles. Most SwiftUI apps are catalogues you browse. This is the one where you write it. WHAT IT PLAYS Swoop runs a documented subset of SwiftUI, on device. • Text, Image, Button, Toggle, Spacer, Divider • VStack, HStack, ZStack, ForEach, TimelineView • Circle, Capsule, Rectangle, RoundedRectangle • frame, padding, offset, opacity, scaleEffect, rotationEffect, zIndex • fill, stroke, trim, background, overlay, clipShape, shadow • animation, onAppear, symbolEffect, sensoryFeedback • @State, helper funcs, computed views, if/else, ranges • sin, cos, tan, sqrt, pow, min, max, .pi If Swoop cannot play something exactly the way Xcode would, it refuses and points at the line rather than guessing. What you copy always compiles. Swoop is for one component at postcard size — not for building whole screens on a phone. ScrollView, List, NavigationStack, GeometryReader and TextField are deliberately not included. A REAL EDITOR • Line numbers and syntax colour • Autocorrect, smart quotes and autocapitalisation switched off • Every file in your library previews itself, running, in the list POST IT AND RECORD IT • Publish a component to the community, free, under your username • Anyone can play it and take the source • Record three seconds of it running and share the video • Like and view counts on everything published PRIVACY • Your files are saved on your phone • Nothing is uploaded, read by us, or used to train anything • A file leaves the device only when you publish or share it • Writing, playing and copying never need an account • Sign in with Apple or Google only to publish or like • Delete your account from inside the app, any time SWOOP PRO • A profile page — your picture and a grid of your work • Clean recordings, without the Swoop mark • Sign a recording with your avatar and username • Backdrops for recordings • Post a component without handing over the source Writing, playing, copying and publishing stay free. Requires iPhone, iOS 17 or later. Swoop is an independent product and is not affiliated with or endorsed by Apple Inc. Swift, SwiftUI and Xcode are trademarks of Apple Inc. Privacy Policy https://swoopswift.com/privacy/ Terms of Service https://swoopswift.com/terms/