WhatsApp is adding Recuérdame on some phones. That is a ping on one message, not a list of conversations you still owe a reply. ReplyStash is a pending-replies inbox.

Share text from any app, add the person’s name, set a local reminder frequency, open it when you can answer, and mark it replied. Everything stays on the device. No account, no cloud sync. Ads are interstitial after every third saved message; message text is never sent to Google.

If work follow-ups and appointments keep slipping, this is the tray.

Why built: I kept screenshotting chats I needed to answer later and then losing the screenshot.