Simple Memo（Obsidian連携シンプルメモ） is an iOS memo-to-email app from Japan’s Yurica Inc., developed and operated by AI Ataka. It was created after Captio was discontinued in October 2024, with the goal of recreating the ultra-minimal “open, type, send” experience. It is not an official successor to Captio, but an independent app aimed at individual users who need to quickly capture ideas and move them into an email or Obsidian workflow.
Based on the available description, Simple Memo is not focused on complex note management. Its core value is reducing friction when recording ideas: the app launches in about 0.3 seconds, sends in around 150ms, and emphasizes a sub-second experience. When offline, memos are stored in a local Outbox on the device and automatically resent once the network is restored, helping avoid the common problem of assuming something was sent when it was not actually delivered. Its tech stack includes UIKit, Cloudflare Workers, and Resend API, with support for iOS 16.0 and later.
The product’s privacy claims are relatively clear: the server does not store memo content, and after sending is completed, the text disappears from server memory as well. The on-device Outbox is encrypted with AES-GCM, and communications use HTTPS/TLS 1.3. On the email delivery side, DKIM, SPF, and DMARC are mentioned. For third-party integrations, the description explicitly mentions Resend API and Cloudflare Workers, and positions the app around Obsidian connectivity, though it does not explain the specific Obsidian plugin or sync mechanism.
Pricing information is limited, with only “free download” and “3-minute setup” disclosed. For now, its value for money appears good, but if subscriptions or premium features are introduced later, the App Store listing should be treated as the source of truth. Ease of use is its biggest strength: it is well suited to users who do not want to organize folders or categories, and simply want to send fleeting thoughts to themselves as quickly as possible.
Its strengths are minimalism, speed, a clearly stated privacy design, and reliable offline auto-resend. Its limitations are that only iOS support is currently visible, with no sign of team collaboration, permission management, an enterprise admin console, a public API, or complete pricing details. It is best suited to former Captio users, Obsidian-based personal knowledge management users, and individual creators who care about fast input. It is not a good fit as a team-level SaaS note-taking tool, project management system, or knowledge base platform.
Access from China is not disclosed in the available description. Since its backend relies on Cloudflare Workers and email delivery depends on Resend API, actual usability may be affected by the network environment, email provider, and App Store region. If access or payment is restricted, alternatives such as Apple Notes, Obsidian mobile, Flomo, or Drafts may be worth considering.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on simplememofast.com official site.
simplememofast.com is an Japan SaaS Tools provider. TG4G tracks its product information, with monthly pricing from $3.20, an overall rating of 8.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach simplememofast.com directly.