Overlay One vs PiggyNotebook
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Overlay One
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Overlay is an AI assistant with a memory. Capture anything β a note, a task, a link, a half-formed idea β and Overlay's brain organizes it, connects it, and remembers it. Then you can chat with everything you know. Most apps make you file things away and dig them back out. Overlay does the filing for you and brings the right context back the moment you need it. WHAT YOU CAN DO β’ Capture in one tap β Jot a quick note from anywhere. Overlay's brain decides whether it's a note, a task, or something worth remembering, so you never stop to choose. β’ Chat that actually knows you β Ask questions and get answers grounded in your own notes, tasks, and saved pages β not a blank-slate chatbot. β’ Tasks, automatically β Action items are pulled out of what you capture. No separate to-do ritual. β’ A brain that grows β Overlay builds a living memory from what you save: the people, projects, and topics you care about, and how they connect. β’ Your best prompts, saved β Keep the prompts you rely on a tap away. ONE BRAIN, EVERYWHERE Overlay works on iPhone, in your browser, and on the web β all synced. Save a page from your laptop and it's waiting in your pocket. Every capture is tagged with where it came from, so nothing gets lost. BUILT ON THE BEST MODELS Overlay runs on leading AI models, including Anthropic's Claude and Google Gemini, choosing the right one for the job. PRIVATE BY DESIGN Your knowledge is yours. Everything is secured per-account, and you stay in control of what Overlay remembers. Stop losing your best thinking. Scale your brain.
PiggyNotebook
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100% Free! PiggyNotebook is an AI-powered note-taking app that helps you capture scattered thoughts and gradually turn them into structured knowledge. Ideas often come to us when we don't have time to organize them. With PiggyNotebook, you can quickly capture your thoughts using text or voice. AI understands your notes and automatically organizes them into relevant topics. As you add more notes, AI uses the previous content within each topic to organize and summarize your thoughts, gradually turning scattered ideas into more complete and useful knowledge. Key Features β’ Quickly capture thoughts with text or voice β’ Automatically organize notes into relevant topics with AI β’ Build up ideas under the same topic over time β’ AI-powered summaries based on your previous notes β’ Great for learning, work, ideas, and everyday thinking You don't need to decide how to organize everything in advance. Just capture your thoughts and let AI handle the rest.
Screenshots
Verdict
The clearest difference is update cadence: PiggyNotebook at every 3 days against Overlay One's every 3 weeks. PiggyNotebook also leads on iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Overlay One ships an update every 3 weeks, PiggyNotebook every 3 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | Overlay One | PiggyNotebook |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 3 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.0 β better |
| Further details β not scored | ||
| Size | 21 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | ηθη«ζ± θΎθ₯Ώηη« | Yuan Wan |
In-app purchases
Overlay One
No in-app purchases
PiggyNotebook
No in-app purchases









