Solid Diary - AI Journal

Solid Diary is a privacy-first journaling app built by Solid Apps SRL for iOS, iPadOS, and macOS. The premise is simple: end your day with a moment of calm reflection, write freely, and let an optional AI analysis help you understand the thoughts and emotions behind what you wrote. It is deliberately a diary rather than a planner or task manager, so the experience stays focused on reflection.

Privacy is central to the product. Entries are encrypted with 256-bit encryption and can be locked behind biometrics, and the developer states that only the rightful owner can access and decrypt the data, with no advertisers or partners tracking users. Beyond writing, the app supports unlimited uploads of images, voice recordings, and sketches, rich text formatting, tagging, four themes, and a set of stats and achievements to keep the habit rewarding.

The AI layer turns a journal entry into a reflective second opinion: it identifies the emotions your writing conveys, explains why you might be feeling that way, and suggests ways to handle what is on your mind. Reviewers frequently describe it as a supportive, on-point companion for self-reflection. Pricing is a one-time purchase with no subscription, and buyers can unlock Solid Diary alone or all five Solid Apps with a single lifetime purchase. A new Evo app also uses AI features that were not offered by Solid Apps SRL before.