A. No. Idevo does not require a subscription. The app uses a freemium model with three modes:

• Basic (Free): Fully offline, no account, no tracking. Limited to importing the last 3 months of ChatGPT history.
• Lite (One-time purchase): Removes the 3-month import limit.
• Pro (One-time purchase): Unlocks Insights (charts & analytics) and all Lite features.

Idevo remains offline-only, with no ads and no data collection. You can upgrade Lite or Pro at any time, but nothing requires a recurring subscription.

A. No. Idevo does not require you to create an account or sign in.

It organizes and visualizes ChatGPT conversation data obtained by the user, with all processing and storage completed securely on your iPhone.

A. You can export it from ChatGPT → Settings → Data Controls → Export Data. The export can be performed on both the app and the web version.

After you tap the export button, OpenAI will send an email to the address registered with your ChatGPT account. The message includes a download link to a .zip file containing your conversations.json.

Note: Email delivery may take several hours, or in some cases up to a full day. Since the export process is managed by OpenAI, please contact OpenAI Support for details regarding any delays or issues.

A. No, everything can be done on your iPhone.

As long as the email associated with your OpenAI account is accessible on your iPhone, the entire export–import flow can be completed on your device.

Once the export process is completed on OpenAI’s side, you will receive an email titled “ChatGPT – Your data export is ready.”
*Please note that it often takes some time for this email to arrive.

Tap the “Download data export” link in the email, and Safari will begin downloading the .zip file to your iPhone.

After the download finishes, simply tap the “Import” button in Idevo and select the .zip file. The app will automatically extract only the necessary data from within the archive.

Once the email arrives, the remaining import steps typically take only a few minutes.

A. This feature lets you save your favorite ChatGPT responses to custom Favorites groups. You can easily create new groups and reorder them with intuitive gestures.

You can create up to 10 Favorites, making it easy to organize them by theme or purpose.

A. Yes, it does. In Idevo, you can swipe between the main tabs — Insights / Timeline / Memory — as well as your Favorites groups.

Swiping makes navigation smooth and effortless, even with one hand.

A. Yes. You can export selected responses as a PDF. You can also customize options such as showing the ChatGPT label or including page numbers — all from the menu.

* PDFs are generated on your device and can be shared via AirDrop, Mail, or Files.

A. No. Idevo is a fully offline app. Your imported conversations are processed and stored entirely on your device, with no network transmission or data upload performed by the app itself.

Note: Like other iOS apps, Idevo’s local data may be included in your system-level iCloud backup if you have it enabled. When you export a PDF, the file is also generated entirely on your device. Idevo never uploads or transmits any content externally — sharing occurs only when you choose to send the file via AirDrop, email, or other apps.

A. All charts are rendered on-device using Apple’s native technologies. Idevo reads your exported conversations.json locally and analyzes model usage and monthly trends — all without any server or upload.

A. All conversation text is protected with strong on-device encryption. The encryption keys are generated and stored only on your device, and never leave it.

Non-personal metadata (e.g., tags, timestamps) is stored locally as well — and nothing is ever sent to any server.

For additional privacy, we recommend enabling Face ID Lock by long-pressing the Idevo app icon. This adds an extra layer of protection by requiring Face ID / Touch ID whenever you open the app.

A. In the current version (v1.1), importing a new conversation file will replace your existing library with the new content.

However, if the new file contains the same responses as those you previously saved, your Favorites will be preserved.
(Example: If a response you marked as Favorite is also included in the new file, it will be restored automatically.)

In addition, incremental import (adding only new conversations) is planned for a future version.
Please wait a little longer.

A. Idevo is a tool designed to archive insights gained through conversations with AI, and help users revisit them intuitively through its unique features and experience.

With a strong emphasis on security and privacy, and a philosophy built around offline-first design, Idevo allows users to quietly revisit the accumulation of their thoughts and conversations on their own device.

Every update is designed with a single goal in mind: to remain something users can rely on over time, without entrusting their thinking to external systems.

*Specific features and timelines are not publicly disclosed. Please refer to the official website or App Store updates for the latest information.*