ABC - Wooden Words, a word puzzle game, is free to download on the App Store with optional in-app purchases for hints/wallpapers. The app's own description states "Game completely Free." No purchase required to play.
Marklist, a read-it-later and note app for iPhone/iPad, is currently listed as Free on the App Store (with optional in-app purchases for Pro features). No purchase or signup is required to download and use the core app.
NasScale, an iPhone client for self-hosted Synology NAS users with built-in Tailscale connectivity, file management, remote media playback and download-client integration, shows as free on the US App Store — no in-app purchases listed. Other storefronts (e.g. Taiwan) still show a small paid price (~NT$30 / roughly $0.99), consistent with GOTD's claimed "$0.99, FREE TODAY" promotion.
💻 Rotely - Digital Flashcards (iOS app) — free today
Rotely, an AI-assisted digital flashcard app for exam revision, language learning, and study, is free to download on the App Store — no in-app purchases listed at all. Unlimited flashcard decks, AI-generated answer suggestions (on Apple Intelligence devices), rich media cards, text-to-speech, and iCloud sync are all included at no cost.
StyleGuide, a developer utility for previewing Apple's Human Interface Guidelines typography, colors, SF Symbols and screenshot sizes, is currently showing as "Free · In-App Purchases" on the App Store (normally priced around $2.99–$3.99 in most storefronts, per other indexed listings). No purchase or credit card is needed to download and use the core preview tools; an optional StyleGuide Pro subscription unlocks extra features.
Video to Frames－Extract Photo is currently free on the U.S. App Store. It lets you step through videos frame by frame and export individual or multiple frames as photos.
Free today: Mock Interview Prep AI is offering its Lifetime in-app purchase for $0.00. The iPhone app provides spoken mock-interview practice, STAR-method guidance, and feedback. An optional Unlimited Mock Interviews purchase is also listed at $3.99.