[01]Peer-reviewed
Allopregnanolone in premenstrual dysphoric disorder (PMDD)
Hantsoo & Epperson · 2020 · Neurobiology of Stress
Where it’s used
Anchors the luteal chapter — and the "period ≠ worst mood" myth.
The Field Manual · 13 pages · cited · €7
Decode the signal every week of the month.
The 13-page shortcut for men who’d rather understand than argue. Her hormones run 4 operating systems a month. This is the map — every non-trivial claim tagged to peer-reviewed evidence.
Instant PDF€7 · One-timeNo subscription
The problem
You read the same advice every guy reads. And it still feels like a guessing game.
You don’t know why she was laughing with you Saturday night and shutting you out by Monday. Same you. Same dynamic. Different week.
You default to the moves that worked in week 1 — and they fall flat in week 3. You’ve noticed you’ve been reading “she’s fine” as “she’s fine.” You’re not wrong to feel like something’s off.
You’re not bad at this. You’re just running on missing information. Her hormones shift every week. Each shift rewrites how she thinks, feels, and connects. That’s the pattern every piece of advice leaves out.
Saturday night
She’s laughing with you.
You run the same playbook on Monday. She shuts down. You assumed it was about you. It wasn’t. It was day 23.
The opener that worked
Week 1 moves, Week 3 results.
What landed in her Crest week falls flat in her Ebb. You default to the one thing that worked last time. Timing is everything.
The "I’m fine" trap
"Fine" isn’t "fine."
You read it at face value because the alternative is guessing. The pattern tells you which "fine" needs space and which one needs closeness.
What’s inside
13 pages. 4 phases. 8 scripts. 10 citations. Zero fluff.
One afternoon. One read. Every non-trivial claim tagged to the primary literature (Hantsoo 2020, Jünger 2018, Iacovides 2015). A framework you’ll reference every week for the next decade.
01Days 1–5
The Deep
What you’ll learn for The Deep
Low energy week. The moves that backfire: "what’s wrong?", fixing, gym-bro energy. The moves that land: silence, snacks, heat pads, no questions.
02Days 6–13
The Swell
What you’ll learn for The Swell
Rising energy. She wants momentum. The move: plan the date, bring the idea, stop deferring. Passivity now reads as disinterest.
03Days 14–16
The Crest
What you’ll learn for The Crest
Peak connection window. 72 hours that won’t repeat for a month. The mistake: treating it like any other day. The move: be fully present.
04Days 17–28
The Ebb
What you’ll learn for The Ebb
Old wounds surface. Logic escalates, physical care de-escalates. Read quiet as anxiety, not rejection. Hold steady. Don’t debate feelings.
Also included
8 real-world scripts + cited references page
“Say this, not that” for the weeks that break most men. Tested, non-cringe, phase-aware. Plus a full references page — you can check the receipts.
Also included
One-page cheat sheet
Pin it. Screenshot it. Keep it on your phone. Glance and know which week you’re in — in 10 seconds.
The table of contents
13 pages. Here’s what’s on each one.
No padding, no filler, no narrative fluff. Every page pulls its weight. If a claim made it in, a citation is behind it.
- 01
Cover
Protocol 001 · Field Manual
- 02
Introduction
She’s not moody. You’re missing the pattern.
- 03
The Science
Estradiol, progesterone, testosterone — the 60-second map
- 04
The Four Tides Explained
Cycle wheel + the 4 operating modes
- 05
Phase 01 · The Deep
Days 1–5. The reset. Not the mood window.
- 06
Phase 02 · The Swell
Days 6–13. Lowest volatility. Decide here.
- 07
Phase 03 · The Crest
Days 14–16. Peak libido. Show up fully.
- 08
Phase 04 · The Ebb
Days 17–28. De-escalation > confrontation.
- 09
The Cheat Sheet
One-page phase-comparison grid
- 10
FAQ
The questions every man actually asks
- 11
Communication Scripts
8 say-this-not-that real-world scripts
- 12
References
10 peer-reviewed sources + notes on contested claims
- 13
Next Steps
What to do with this — and what not to.
Bundle add-on: 4 phase deep dives (8 pages each, cited) · available in the €17 Playbook
Check the receipts
Three of the ten sources. Cited in the Field Manual.
Every non-trivial claim in the manual is tagged to a peer-reviewed source. Here are three you can verify before you buy. The other seven are inside — along with the specific pages they underwrite.
[02]Peer-reviewed
Do women’s preferences for masculine voices shift across the ovulatory cycle?
Jünger et al. · 2018 · Hormones and Behavior
Where it’s used
Null preregistered replication. Kills the "she strays at ovulation" narrative.
[03]Peer-reviewed
What we know about primary dysmenorrhea today: a critical review
Iacovides, Avidon & Baker · 2015 · Human Reproduction Update
Where it’s used
Prostaglandin mechanism of cramping. Grounds the Deep-phase tactics.
No other men’s-cycle resource cites primary research. Most recycle 2014-era pop-psych that has since failed replication. Ocean Drop doesn’t. See all 10 sources on the References page inside the manual.
Pick your level
Field Manual or Complete Playbook?
Start with the 13-page shortcut. Or grab the Playbook with 4 standalone phase deep-dive PDFs (8 pages each, cited), a lockscreen wallpaper, and 30 days of priority support.
Start here€7
The Four Tides — Field Manual
The 13-page starter system for decoding her cycle
- 4 phases decoded — her energy, mood, and needs per week
- 8 real-world scripts — what to say when she says “I’m fine”
- One-page cheat sheet — keep it on your phone
- Instant PDF download
Most chosen€17
The Complete Playbook
Field Manual + 4 phase deep dives + 30 prompts + wallpaper
- Everything in the Field Manual (13 pages, cited)
- 4 phase deep dives — 8 pages each, cited (The Deep · The Swell · The Crest · The Ebb)
- 30 phase-aware prompts — one for every day of her cycle
- Lockscreen wallpaper — the 4 phases at a glance
- Priority email support for 30 days
Couples therapy: €80–150/session. Reddit rabbit hole: 40 hours. This: €7. One-time.
Not sure where you stand?
Take the 60-second Partner Support Score.
Find out how much of the pattern you’re already reading — and where you can level up.
Objections, handled
The questions you’re already asking.
If the thought crossed your mind, it’s probably down here.
I don’t need a book to understand my girlfriend.+
Nobody needs one. The men who read the pattern anyway have the same edge as the men who skip the book — they’re just paying for it in years of guessing. This is the shortcut: 13 pages, one afternoon, every non-trivial claim cited. You run on engineered intelligence instead of trial and error.
How do I know this isn’t pop-psych dressed up?+
Because we cite. Ten peer-reviewed sources in the Field Manual. Four to six more in each of the 4 phase deep dives. Where the literature is mixed or a popular claim has failed replication — the ovulatory mate-preference shift, "all women get PMS," "period = worst mood" — we say so in the text and flag the myth. No other men’s-cycle resource does this.
€97 for a PDF? That’s a lot.+
The €97 tier is the full system — printed workbook, 8 video modules, direct support. The PDF is €7. That’s the price floor on purpose: the Field Manual is a one-time, permanent upgrade to how you read the next decade of your relationship. Most men start there and never need anything else.
What if she finds it on my phone?+
Every man who’s worried about this has reported the same thing: she found it, read two pages, and her read of you went up. Caring enough to decode the pattern reads as competence, not a cheat code. It’s not a secret playbook — it’s an operating manual you were never handed.
Is tracking her cycle invasive?+
Only if used without consent, and Ocean Drop is not built for that. You can use shared timing context respectfully, or partner sharing if both people choose to connect. She always controls what is visible.
Does my partner need to use the app too?+
No. You can use Ocean Drop independently with basic information. If she chooses to connect, guidance becomes more precise and the calendar syncs between you.
Is the AI giving medical advice?+
No. Drop and Marina are AI assistants that provide wellness and relationship guidance only. They are not medical professionals and will always recommend consulting a healthcare provider for health concerns.
What data does the AI see?+
The AI receives the current cycle phase, upcoming events, and your conversation messages to generate relevant responses. It does not see raw health data like period dates or symptoms — only the derived phase context.
How is my data protected?+
All data is encrypted in transit (TLS) and at rest (AES-256). Our database is hosted in the EU. We do not sell personal data. You can delete your entire account and all associated data at any time from within the app.
Is this for every relationship type?+
Ocean Drop is built for men supporting a female partner. The app will add more modes later, but every current product — Field Manual, Playbook, 28-Day OS, Master Navigator — is written for that specific situation.
Do I need to buy anything to start?+
No. The Cheat Sheet is free. The €7 Field Manual is the smallest paid step. Everything else is optional.
One read. One afternoon.
Stop guessing.
Start reading
the room.
Instant PDF download · Written for men 18–35