Crab Fit vs WhenIsGood

Crab Fit

• Friends, clubs and coworkers picking a time for a one-off event
• Groups whose members should not have to create accounts
• People who want to run their own scheduling poll server

WhenIsGood

• Organizers who want an availability poll with no sign-up and no adverts
• Groups in different time zones choosing a time for a call
• One-off meetings and events where invitees should not need accounts

Crab Fit

• Events are deleted after 3 months of inactivity, so it does not keep a long-term record.
• The mobile app is for Android only; no iPhone app is listed.
• Extensions are offered for Firefox and for Safari on Mac. The project's code notes that the Chrome extension was removed.
• It needs a connection: the app's own message says a Crab Fit does not work offline.

WhenIsGood

• Event links have no passwords; the FAQ relies on the random invitation URL being hard to guess.
• The FAQ describes calendar integration only as an iCal (.ics) export of the chosen time, so availability is entered by hand.
• Without an account, you need the results code from the event-created page to see responses later.
• The site text is in English only; the language box changes how dates, times and numbers are written.

Crab Fit

Events created in one form

Name the event or leave the name blank to have one generated, pick specific dates or days of the week, drag out a time range and choose a time zone. There is no sign-up step.

Live availability heat map

Responses appear live on a heat map where darker cells mean more people are free. Hovering or tapping a slot shows who is available, and names can be clicked to view people individually.

Google and Outlook calendar import

When entering availability you can sync with Google Calendar or Outlook Calendar, or reuse a recent event. Importing overwrites the availability you had already entered.

Time zone handling

Each event stores the time zone it was created in, and a respondent can switch to their detected local time zone. Hours outside the event are greyed out.

Name and optional password per event

Respondents enter a name for each event and can add a password to stop others changing their availability. The site says passwords are hashed.

Open source and self-hosting

The code is published under the GNU GPLv3, and the repository links to a guide for running your own instance.

WhenIsGood

Paint-the-grid event setup

Click the grid for the dates and times you propose, optionally name the event, and press Create Event to get a link for invitees and a results code for yourself.

Results with near misses

Times that suit everyone show in green, and near misses carry red dots for the people who cannot make them. Respondents are listed from most flexible to least flexible.

Adjustable slots and hours

Buttons switch the grid between 15-, 30- and 60-minute slots or whole days, and the options panel widens the hours beyond the default 8am to 6pm.

Time zone support

With time zones switched on, proposed times are adjusted to each invitee's own zone, and the results page produces text showing the chosen time for every invitee.

Optional account and dashboard

Logging in with an emailed six-digit code, with no password to choose, collects your events and responses on a dashboard so results codes do not have to be kept.

Email alerts and iCal export

An organizer can ask for an email whenever someone responds. Clicking the chosen time on the results grid gives an iCal (.ics) link to add to a calendar or attach to an email.

Crab Fit

• Crab Fit$0

  The complete web tool, the Android app and the Firefox and Safari extensions. Donations are optional.

WhenIsGood

• Free$0

  Create events, collect responses and view results at no cost, with or without an account. No adverts are shown.