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 from Lite to Pro at any time.

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, and in some cases up to 24 hours. Since the export process is managed by OpenAI, please contact OpenAI Support for details regarding any delays or issues.

A. Not necessarily.

As long as the email associated with your OpenAI account is accessible on your iPhone, the entire export–download–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 may take some time for this email to arrive.

Tap the “Download data export” link in the email, and your default browser (such as Safari) will begin downloading the .zip file.

After the download finishes, tap the “Import” button in Idevo and select the file. The app will automatically extract the necessary data.

For very large files or unstable network conditions, downloads may become incomplete. In such cases, downloading the file on a computer is recommended.

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

A. The import behavior depends on the mode you are using (Basic / Lite / Pro). The available options and the range of data processed differ by mode.

Basic mode
When you import a new conversation file, your current library is replaced with the new data.
Conversation threads with activity within the last three months are eligible, and the entire thread is imported.

Lite / Pro modes
You can choose between two import methods.

① Append import (diff import)
Only conversations and newly added messages (questions and responses) that do not already exist in Idevo are imported.
Existing data and favorites are fully preserved.

② Replace import
Your current library is replaced with the contents of the new file.
If the new file contains the same conversations or messages, previously saved favorites are retained.

All data is processed securely on-device, and Idevo never sends your data to external servers.

A. Yes. Idevo supports importing .zip exports that contain multiple conversation files. In addition to the standard conversations.json, it can also read split files such as conversations-xxx.json.

For Lite and Pro users, these can be added to your existing archive using additive import.

Please note that very large files or incomplete downloads may fail to load properly. If this happens, try downloading the file again.

A. Conversation threads that consist only of transcripts generated from voice conversations may not be imported into Idevo, as they can differ from standard chat data structures.

If you later continue the same thread by typing a message, the conversation will be imported starting from that text-based interaction.

Idevo archives conversations based on the data included in your ChatGPT export, rather than how conversations may appear in the ChatGPT interface.

A. In Idevo, the selected date range is not used to slice or trim individual messages. Instead, it is used as a condition to determine which conversation threads are eligible for import.

If a conversation thread contains at least one message within the specified date range, the entire thread is imported to preserve its continuity. This may include messages from earlier or later dates.

Example:
A conversation thread started in May and continued in November.
→ If November falls within the selected date range, the earlier messages from May are also included.

A. Idevo reads and displays conversation titles exactly as they appear in the exported data.

Depending on the state of the data at the time of export, the original conversation title may still be recorded as “New chat”. In such cases, Idevo displays the title as-is.

If you import data in which the conversation title has been correctly reflected in the original data, the correct title will be reflected in Idevo.

For Lite or Pro users, even if there are no updates to the conversation thread, title updates (renames) are detected and automatically reflected during incremental imports.

A. Yes. Starting from v1.3, conversations can be deleted at the thread level.

• Press and hold a conversation title in the Conversations tab to delete it
• Deletion applies to the entire thread, including messages not currently visible
• Deleted threads are not restored during Additive Import
• To restore them, use Overwrite Import, which replaces your current archive with a new one built from the imported file.

Note: This action does not modify your original conversations.json file.

A. This feature allows you to save specific parts of a conversation as Favorites, acting as markers within your archive.

Favorites can be organized into custom groups, and each title shows its position within the conversation (e.g. #12). Titles can also be freely edited.

You can switch between list view and grid view, creating a more visual and intuitive browsing experience. Group colors can also be customized from the Settings menu.

In addition, content generated by Deep Research is automatically organized into a Research folder, when identifiable information is available in the imported data.

A. When a conversation thread is expanded, the information shown represents the last updated date and the number of turns.

The turn count is based on the number of assistant responses within the conversation thread.

* These elements can be hidden from the Settings menu if preferred.

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.

Note:
PNG image export (chat-bubble sharing) was discontinued in v1.2.

A. Data Management is a screen where you can view and manage your Idevo archive.

It provides information such as:

• The number of conversations and messages stored in the app
• The amount of local storage used by the archive
• The status of File Protection (iOS Data Protection)
• The retrieval time of the archive information

You can also perform bulk actions, such as clearing favorite groups and other added items. These actions do not affect the conversations stored in your archive.

A. In version 1.4, Idevo was redesigned to provide a simpler and more intuitive experience.

As part of this update, the Timeline feature has been discontinued, and the app now focuses on a structure centered around Conversations and Favorites.

Idevo is designed with a minimal interface to keep the focus on reflection.

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. The conversation count shown in Insights does not represent the total number of conversation threads in your archive. For each selected time period (day, week, month, or year), it shows the number of unique conversation threads that had at least one meaningful assistant response.

If the same conversation is active across multiple time periods, it may be counted once in each of those periods.

The message count, on the other hand, represents the total number of meaningful assistant responses generated within the selected period.

These metrics are designed not simply to show raw totals, but to help you reflect on the rhythm, density, and continuity of your thinking and conversations over time.

A. In Idevo, the “average messages per day” metric is calculated based on the number of calendar days within the selected period.

As a result, days with no activity are also included in the average. At the same time, periods with no data and future dates are handled carefully so they do not skew the result.

A. No. Idevo is a fully offline app for your conversation data. Your conversations are processed and stored entirely on your device and are not transmitted to external servers.

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 conversation data is protected with strong on-device AES encryption. Encryption keys are generated and stored only on your device, and never leave it.

Metadata (such as tags and timestamps) is also stored locally and is never transmitted to any server.

In addition, Idevo includes a built-in Privacy Lock feature. You can enable Face ID / Touch ID authentication and choose when the app locks (immediately, after 3 minutes, or after 5 minutes).

The encrypted conversation archive is protected using iOS Data Protection (NSFileProtectionComplete). Under normal iOS security conditions, your data remains protected at the OS level while the device is locked.

Idevo is designed as a post-export, local-only viewer.

It does not access any AI service servers directly, and it only works with conversation data that users have officially exported themselves.

In line with the respective terms of use, conversation inputs and outputs belong to the user. Idevo simply provides a better lens to organize and reflect on that data — entirely on your device.

A. Idevo is a tool designed to archive insights gained through conversations with AI, and help users revisit them in a clear and intuitive way. In the current 1.x releases, our top priority is building a solid and reliable foundation for a long-term archive, based on privacy-focused design.

Every update is designed to store conversation history safely offline, and to remain a tool users can trust and rely on over time, without entrusting their data to external systems.

For the latest updates and development news, please check Medium, Note, or X (formerly Twitter).