Compare

Email apps with to-dos and reminders, side by side

Plenty of mail apps can snooze a message or remind you once. Very few treat an email as a task with a deadline. None besides Gadfly keep after you until it is done.

Gadfly compared with other email apps for to-dos and reminders
Feature	Gadfly	Filo Mail	Spark	Superhuman	Shortwave	HEY	Apple Mail	Gmail + Google Tasks	Outlook + Microsoft To Do
Turn an email into a to-do	✓ Yes	✓ Yes	◐ Partly	— No	✓ Yes	◐ Partly	— No	✓ Yes	✓ Yes
Every to-do gets a deadline automatically	✓ Yes	◐ Partly	— No	— No	— No	— No	— No	◐ Partly	— No
Deadline re-read when the thread changes	✓ Yes	? Not documented	— No	— No	— No	— No	— No	— No	— No
Deadline shows the sentence it came from	✓ Yes	— No	— No	— No	— No	— No	— No	— No	— No
Pressure rises as the deadline nears	✓ Yes	◐ Partly	— No	— No	— No	— No	— No	— No	— No
Push before a to-do is due	✓ Yes	◐ Partly	◐ Partly	◐ Partly	? Not documented	— No	◐ Partly	◐ Partly	◐ Partly
To-dos on the iPhone lock screen	✓ Yes	? Not documented	— No	— No	— No	— No	— No	— No	— No
To-do widget on the home screen	✓ Yes	✓ Yes	— No	— No	— No	— No	— No	◐ Partly	? Not documented
Starred mail becomes to-dos	✓ Yes	— No	— No	— No	— No	— No	— No	— No	✓ Yes
Follow up if no reply	◔ Coming	✓ Yes	✓ Yes	✓ Yes	✓ Yes	— No	✓ Yes	◐ Partly	— No
Any IMAP account (iCloud, Fastmail, your domain)	✓ Yes	◐ Partly	✓ Yes	— No	— No	— No	✓ Yes	— No	✓ Yes
Mail and to-dos in one app	✓ Yes	✓ Yes	◐ Partly	— No	✓ Yes	✓ Yes	— No	◐ Partly	— No
No ads, mail is not the product	✓ Yes	? Not documented	✓ Yes	✓ Yes	✓ Yes	✓ Yes	✓ Yes	◐ Partly	◐ Partly
Price	€9/mo	Free; Plus $9.90/mo	Free; Plus €10/mo	From $30/mo	From $30/mo	$99/yr	Free	Free	Free / Microsoft 365

✓ yes · ◐ partly · ◔ coming · ? not documented · — no. From each product's own docs and pricing pages, checked November 2026. Spotted a mistake? Tell us and we fix it.

One by one

Gadfly vs Filo Mail

To-dos get one notification, deadlines are read once, and there is no lock-screen to-do widget.

Gadfly vs Spark

Reminders fire once. To-dos live in Todoist or Notion, not Spark. Lock-screen widgets show mail, not tasks.

Gadfly vs Superhuman

No task object, no deadlines, Gmail and Outlook only, and three times the price.

Gadfly vs Shortwave

Gmail only (others through forwarding), prices went up in 2026, and todos do not chase you.

Gadfly vs HEY

You must move to a @hey.com address or your domain; no IMAP; piles have no deadlines.

Gadfly vs Apple Mail

Remind Me brings a mail back once and only from the inbox; there are no to-dos or deadlines.

Gadfly vs Gmail + Google Tasks

Tasks live in a side panel or another app; one notification; no deadline from the mail itself.

Gadfly vs Outlook + Microsoft To Do

Due dates have no time, reminders are set by hand, and mail and tasks are two apps.

Gadfly vs Notion Mail

Notion Mail shut down on 22 September 2026.

Gadfly vs Boomerang

An add-on, not a client; a mail comes back once; no to-dos or deadlines.

Stop losing mail you meant to answer

Early sign-ups get 3 months of Pro free, not 1.

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