For iPhone
A quiet place to say the hard things, gently.
Undertone is a private space for two people to check in on each other, share how they are feeling, and say what is often left unsaid. No pressure to get it right in the moment.
For iPhone, iOS 17 or later. Older iPhones included.
Built for the in-between moments
Undertone is for couples who want to feel more connected without the pressure of having to get it right on the spot. Instead of a difficult face-to-face conversation, or the noise of a messaging app, both partners get a quiet, private space to share how they are feeling and check in on each other.
It is for the things you want your partner to know, but do not always know how to say out loud.
What it does
Six things, in plain language.
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Check-ins that wait for you
One person writes when they have the words. The other reads when they have room for it. Nothing demands an answer in the same breath, so neither of you is put on the spot.
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Name the feeling first
Pick the feelings that fit from a short list, add why in your own words, and choose how soon you are hoping to hear back. Naming it first often does half the work.
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Help finding gentler words
An optional step offers a softer way to phrase what you wrote. iPhones with Apple Intelligence work it out on the device; every other iPhone gets Undertone's own built-in suggestions. Either way nothing is swapped in for you: you pick a version, or keep your own words.
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Unpack, just for you
A private check-in that your partner never sees. It walks you through what you are feeling, how big it is, what set it off, and what might help, before or instead of writing to anyone.
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A reply that is not a whole conversation
Send something small back instead: I hear you, I am holding this with you, or I need a bit longer, but I have got it. Enough to say it landed, without having to answer it all yet.
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One shared place for all of it
Everything the two of you have sent sits together in one calm view, with the feelings and the replies alongside it. Something to look back on, not a thread to keep up with.
A look inside
Five screens from the app.
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Sign in and pairSign in with Apple, then pair with one person. Only ever one. -
HomeStart a check-in, unpack something on your own, or look back at what you have shared. -
Feeling promptsWork out what you are feeling, one question at a time. -
Let them knowA small acknowledgement, and a sense of when, with no clock on it. -
Between youEverything the two of you have sent, in one place.
Who it is for
If any of this sounds like you, Undertone was built with you in mind.
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Couples who struggle to find the right moment
There is never a good time, and the moment you find is rarely the calm one. Here, the moment does not have to be shared.
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Long-distance partners
Different time zones, patchy signal, and calls that have to be scheduled. A note does not need you both awake at once.
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People who process internally before they can talk
If the words only arrive an hour later, this is a place to put them when they do.
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Relationships going through a stressful period
Illness, grief, a new baby, work that will not let up. When there is no spare capacity for a hard talk, there is still space for a note.
Private by design, not by promise
The whole point is a space safe enough to say something difficult in. That only works if the app is built that way underneath.
- Drafts never leave your phone. Half-formed thoughts autosave on the device and are never sent anywhere. Only a note you actually send goes further.
- Your private reflections stay private. Unpack is stored separately from anything shared. Your partner can never read it, and neither can we.
- No read receipts, no typing indicators, no unread badge. The app never shows the gap where a reply is not yet. Reading something is not a promise to answer it.
- No analytics of any kind. Nothing tracks what you tap, read, or write. Notifications never carry what a note says, only that one is waiting.
- Two people, and only two. Pairing is mutual and exclusive. Nobody can be added, and nobody can quietly be swapped for someone else.
- Ending it really ends it. Unlinking closes the pairing for both of you and permanently deletes every note the two of you wrote.
In closing
No performance, no score, no judgment. Just you two, at your own pace.
There is nothing to keep up with here. No streak to protect, no rating on how you are doing, and no right way to fill it in. Write when you have something to say, and read it when you are ready.
Questions? contact@undertone.cloud