Is a digital card too impersonal for an apology?

It depends entirely on the words. You can also print it and hand it over, which some people prefer.

What tone should I choose?

Sincere. Answer the questions plainly and the finished card follows that tone.

Should I send it immediately?

After you have spoken, not instead of speaking.

Apology Gifts

A Sorry Gift For Your Girlfriend That Is Not Flowers

Flowers after an argument are so established that they have become a genre, and everyone can read the genre. The subtext is 'I would like this to be over now', which is rarely the same as 'I understand why you were upset'. A written apology is slower to produce and much harder to dismiss.

Show your working

Explain what you think went wrong from her point of view, not yours. Getting her side right on paper is more persuasive than any amount of regret about your own behaviour.

Avoid the conditional apology

Anything containing 'if you felt' is not an apology. Written down, that construction is glaringly obvious, which is one reason writing it out helps.

Give her the last word

End by asking rather than concluding. An apology that closes the subject unilaterally is just a longer way of being defensive.

What makes it personal

One accurate sentence about how the argument felt to her will outperform five about how sorry you are.

What we would make

Digital Emergency Card & Envelope — $4.99

A sealed digital envelope they break open themselves, with a personalized card inside. Delivered as a private link, so there is nothing to ship.

A sealed card that names the specific comment you made and does not explain it away.
A coupon booklet weighted towards listening rather than gestures.
A card closing with a question instead of a resolution.

MAKE THEIR EMERGENCY CARD

Also worth considering: Relationship Coupon Booklet.

How it works

Answer a short set of questions about the person — habits, history, the running jokes.
We write the gift from your answers and show you the finished thing.
Pay $4.99 once, then download the clean file or send the private link.

Questions

Is a digital card too impersonal for an apology?: It depends entirely on the words. You can also print it and hand it over, which some people prefer.
What tone should I choose?: Sincere. Answer the questions plainly and the finished card follows that tone.
Should I send it immediately?: After you have spoken, not instead of speaking.

Ready when you are

About four minutes from here to a finished gift. You see the whole thing before you pay.