Your cycle, cozier. Your partner, finally in the loop.
Mochi Moon is a cozy pixel-art period tracker with a free companion app for your partner. They see your phase in plain language and how to show up for you, like they can read your mind. You choose what they see.
How Mochi Moon works
Track like normal. Share what you want. Watch them show up.
Track your cycle
Log your period, flow, symptoms, mood, energy and sleep in a few taps. Get predictions, late-period heads-ups and a guide to your four phases.
Invite your partner
They download Mochi Moon free and tap "I'm here for my partner". You decide exactly what's shared, and you can pause anytime.
They know what you need
Your phase in plain language, daily quests from your check-in ("bring snacks", "give space"), sweet text ideas and a period heads-up.
No more guessing what's going on
Most partners want to help. They just don't know when or how. Mochi Moon turns your cycle into simple, kind actions.
- "She's in her luteal phase." What that means, in human words
- Daily quests from your check-in, like a warm drink or quiet time
- Rough-day alerts when you need extra care
- Period heads-up a couple of days before, so snacks arrive early
- A shared pet you both take care of
Four phases, four moods
Your cozy room changes with your cycle, and so does the guidance. Everyone is different, so Mochi Moon learns from what you log.
Rest mode. Warmth, snacks, soft plans and fewer obligations.
Energy often climbs. A good window for new plans and fresh starts.
Many people feel social and confident. Date night energy.
Winding down. Cravings and moods can shift, so extra kindness helps.
Your cycle is nobody's business but yours
- Your data stays on your iPhone
- Partner sharing runs through your own private iCloud, not our servers
- No ads, no third-party analytics, no tracking
- We never sell or share your data
- Discreet notifications that hide cycle details
Simple pricing, for both of you
Free to download. The partner app is always free. If either of you gets Plus, it unlocks for both.
Free
forever
- Period & cycle tracking
- Predictions and phase guide
- Connect your partner
- Your cozy room and pet
Plus yearly
per year, for both of you
- Full partner insights and daily quests
- Deeper insights and Cycle Wrapped
- Outfits for your pet
- Unlocks for your partner too
Plus weekly
per week
- Everything in Plus
- Cancel anytime
Questions
What is Mochi Moon?
Mochi Moon is a cozy pixel-art period and cycle tracker for iPhone. It predicts your period, explains your four cycle phases and, if you want, connects a free companion app for your partner that shows them what you're going through and how to help.
How does the partner app work?
Your partner downloads Mochi Moon for free and chooses "I'm here for my partner". After you send an invite, they see only what you choose to share: your phase in plain language, what tends to help, daily quests based on your check-in, sweet text ideas and a period heads-up.
Does my partner see all my data?
No. You pick exactly what's shared in Sharing & Privacy (for example, your fertile window is off by default) and you can pause or disconnect anytime. Your partner never sees your notes or detailed logs unless you turn them on.
Is Mochi Moon private?
Your data stays on your iPhone. Partner sharing uses your own private iCloud through Apple's CloudKit. There are no ads, no third-party analytics or trackers, and we never sell data.
How much does Mochi Moon cost?
Mochi Moon is free to download, and the partner app is free. Mochi Moon Plus is $29.99 per year with a 7-day free trial, or $5.99 per week. If either partner subscribes, Plus unlocks for both of you.
Can I use Mochi Moon as birth control?
No. Period and fertile-window predictions are estimates and can be wrong, especially with irregular cycles. Mochi Moon is not a method of contraception.
Does it work for any couple?
Yes. Your partner can be any gender, and you can customize both of your avatars.
Learn your cycle
Clear, sourced guides for you and your partner.
How to Support Your Partner on Her Period: 9 Ideas
Learn how to support your girlfriend or partner on her period with practical, respectful steps: what to ask, what to offer, and what never to say.
Partners & RelationshipsMenstrual Cycle Guide for Partners: Phase by Phase
A plain-English menstrual cycle guide for partners: the four phases, what tends to change in each, and how to be supportive without making assumptions.
Lifestyle & RitualsPeriod Care Package Ideas for Your Girlfriend: 15 Picks
What to get your girlfriend or partner on her period: 15 thoughtful care package ideas, from heat packs to snacks, plus how to personalize them.
Apps & PrivacyBest Period Tracker Apps in 2026: An Honest Comparison
An honest 2026 comparison of Flo, Clue, Apple Cycle Tracking, Stardust, Natural Cycles and Mochi Moon: what each does best, pricing and privacy.
Lifestyle & RitualsCycle Syncing: What the Science Actually Says
Cycle syncing is everywhere on social media, but does it work? Here is what research shows about syncing food, workouts and plans to your cycle phases.
Lifestyle & RitualsEating for Your Cycle: Iron, Cravings and Facts
What to eat across your menstrual cycle without the fad claims: iron during heavy periods, PMS and cravings, and what research does and does not show.
Let them in on it
Track your cycle in a cozy little world, and give your partner the inside scoop they always wanted.