Feature comparison
Choose between browser capture, feeds, newsletters, and the available delivery paths.
Choose an input workflow
| Feature | Browser extension | RSS or Atom feed | Newsletter inbox |
|---|---|---|---|
| Best for | One page you are reading now | A publication with a public feed | Email newsletters |
| Added by | Clicking the extension | Adding a public feed URL | Subscribing with a private Relay address |
| Trigger | You choose Add or Send EPUB | A reading-list schedule or Run now | A reading-list schedule or Run now |
| Content used | The current public article | New feed entries; linked articles may enrich summaries | Sanitized newsletter HTML |
| First scheduled edition | The captured page is already selected | Latest existing feed entry | Latest existing observed message |
| Later editions | Captures added since the last edition | Entries newer than that list's cursor | Messages newer than that list's cursor |
| Private or login-only content | Not supported | Not supported | Supported only when the newsletter is actually received by your Relay inbox |
| X support | Public X Articles only | Not applicable unless supplied by a valid feed | Newsletter content only |
Each reading list maintains its own cursor. The same feed or newsletter can therefore appear in two independently scheduled lists without one list consuming the other's entries.
Choose an output
| Action | Result | Delivery timing | Stored in the library |
|---|---|---|---|
| Add to reading list | The page joins the selected list | At the next scheduled or manual run | When that edition is generated |
| Send EPUB | A one-article EPUB | Automatically after it is ready | Yes |
| Run now | A normal edition using current new entries | Immediately queued | Yes |
| Download EPUB | The existing EPUB file | Immediate browser download | Already stored |
| Send to device from the library | An existing EPUB is resent | Immediately queued for that device | Already stored |
Device comparison
| Destination | Automatic email delivery | Web reader | Direct download |
|---|---|---|---|
| Kindle | Yes, after approving relay@ereaderrelay.com with Amazon | Yes | Yes |
| Kobo | Yes when your Kobo workflow provides an email ingestion address | Yes | Yes |
| Other eReader | Yes when it accepts EPUB personal documents by email | Yes | Yes |
| No registered device | No; books remain library-only | Yes | Yes |
Device providers control their own conversion, limits, and delivery times. Register the exact send-to-device address supplied by the provider.
Plan comparison
The product exposes Free, Basic, and Pro billing tiers. These allowances come from the same server-owned catalog used when a resource is created or a manual EPUB is queued.
| Allowance | Free | Basic | Pro |
|---|---|---|---|
| Devices | 1 | 3 | 10 |
| Private subscription inboxes | 0 | 1 | 1 |
| Sources | 5 | 20 | 100 |
| Reading lists | 1 | 5 | 20 |
| Manual EPUB generations / 24 hours | 3 | 30 | 300 |
| EPUBs in the library | 25 | Unlimited | Unlimited |
| Multiple-device delivery | No | Yes | Yes |
Manual EPUB generations use a rolling 24-hour window. Scheduled editions do not consume that manual allowance, but all editions count toward the Free library allowance. A pending generation also reserves a library place so simultaneous requests cannot exceed the cap.
If an action reaches a plan allowance, eReader Relay leaves existing data intact and shows an actionable message with the current limit and, where applicable, an upgrade path. Allowances are hard-enforced in local development, the shared development environment, and production.