Perimo vs Meridian
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Perimo
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Perimo is a calm, private space to understand your perimenopause — built for real life, not another chore. TRACK YOUR CYCLE One tap for period start, spotting, and flow. See your cycle lengths shift over time — with patterns worth mentioning to your clinician, in plain numbers. HRT & MEDICATION DIARY Log doses, patch schedules, and adherence. Dose changes are tracked so you can see what happened next — all of it lands in your doctor report. GLP-1 MEDICINE LOG Using a GLP-1 medicine? Record the dose and the injection or tablet day your prescriber set, then log each dose, side effects and your weight in kg, lb or stone. A weekly card shows your next scheduled dose, how many weeks you have been on your current dose and what you noted this week. Works with GLP-1 medicines such as tirzepatide (Mounjaro®, Zepbound®) and semaglutide (Wegovy®, Ozempic®). Perimo only records what you were prescribed and never calculates or recommends doses. Perimo is not affiliated with Eli Lilly or Novo Nordisk; medicine names are trademarks of their owners. LOG YOUR DAY IN 30 SECONDS Hot flashes, sleep, mood, energy, and symptoms like night sweats, brain fog, or anxiety. Quick counters and sliders make daily logging effortless — even offline. SEE YOUR PATTERNS Weekly trend charts and a monthly calendar turn scattered symptoms into a clear picture. Streaks gently encourage consistency, because more data means better answers. AI INSIGHTS FROM YOUR OWN DATA Every week, Perimo analyzes your logs and surfaces connections you might miss — like how your sleep shifts on high hot-flash days. Plain language, no jargon, and always with the reminder that this is general information, not medical advice. SYMPTOM LAB — RUN YOUR OWN EXPERIMENT Wondering if magnesium, an evening walk, or skipping late caffeine actually helps you? Pick one change, keep logging, and Perimo compares your symptoms before and after — then shows the difference in your own numbers on a simple evidence card you can bring to your clinician. Not averages. Not advice. Your own data. ASK PERI — YOUR DATA, TALKING BACK Ask Peri answers questions about YOUR patterns — sleep, cycle, medications — using your own logged history, not generic content. Prefer talking? Voice logging turns 30 seconds of speaking into a completed daily log. AI features are optional, clearly labelled, and require your explicit consent; conversations are processed by OpenAI and are never used to train AI models or sold to anyone. Peri gives general information only — it does not diagnose or replace your clinician, and safety-sensitive messages are always directed to real-world help. DOCTOR-READY REPORTS Export a clean PDF summary of your last 30, 90, or 365 days and make your next appointment count. PRIVATE BY DESIGN Your data is yours. Logs are encrypted, stay on your device when offline, and can be exported or permanently deleted anytime. PREMIUM Perimo Premium unlocks Symptom Lab, weekly insights, reports and full tracking. Start with a 7-day free trial, then choose Premium Yearly ($49.99/year) or Premium Monthly ($9.99/month). Payment is charged to your Apple Account. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage or cancel anytime in your App Store settings. Perimenopause can feel unpredictable. Understanding it shouldn't. — Privacy Policy: https://perimo.app/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Meridian
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Sixty-five days since your last bleeding. Not day 14 of anything. Meridian is a log for the years when your cycle stops agreeing with the calendar. It counts days, not cycles. Its only reference is your own median, never a textbook range. WHAT IT DOES 1. The day is the unit. Every screen answers one question: how many days since your last bleeding, and how that sits against your own months. Nothing is numbered against a textbook cycle, nothing counts down, and no date is ever promised. 2. A report you can hand to your doctor. A PDF measured in months instead of cycles, with your bleeding, your symptoms and your medication in one place, and with the symptoms that have nothing to do with a cycle drawn inside the same chart. It works with no connection, and if your plan ever ends your records still leave with you as CSV and as a plain PDF. 3. Not bleeding is a first-class entry. "I have not bled this month" is a button on the home screen. It stays where you put it, with no countdown and no question about pregnancy. 4. No caps and no labels. A bleeding of 22 days is stored and drawn. A gap of 400 days is stored and drawn. Nothing here is ever labeled abnormal, no warning triangle appears over your own body, and no screen carries a verdict about it. 5. Your sleep and your heart rate variability, read from Apple Health, turned into one number for today with the reason written next to it. No watch needed to use the rest of the app. 6. Hormone therapy as a state, not a footnote. Your months before and after, side by side, described and never judged. 7. It says "We do not know yet" when it does not know. When your recent intervals disagree with each other, Meridian shows you the spread they make and refuses to draw a date on top of it. A window arrives the month your own months hold together, and not before. WHY MERIDIAN The meridian of life is the middle of it, understood as the highest point of the arc rather than the beginning of the end. A meridian line is also a real instrument: a strip set into a cathedral floor with a hole of light above it. Florence built one in 1475 and Bologna a much bigger one two centuries later, both for the same reason, because the calendar had drifted away from the sky and somebody had to measure what was actually happening instead of trusting the chart. That is the whole app. NO ACCOUNT AND NO SERVER There is no sign-up, no email and no password. Your records live on this iPhone. Nothing is uploaded to us because there is nowhere to upload it to. No chatbot: your symptoms never enter a language model. Your data can be exported to CSV and PDF at any time, including after you cancel. WHAT IT COSTS 89.99 USD per year, or 13.99 USD per week. Both renew automatically until you cancel, and you cancel in your Apple settings because we never see your card. There is no free trial, which means there is no surprise charge on day eight either. Before the price ever appears you have already seen your own 24 months drawn on screen, and the app has told you plainly whether it is a fit for your situation. If it is not for you, ask for a refund within 30 days. The app has a screen that explains exactly how, and Apple is the one who handles it. WHAT MERIDIAN IS NOT It is not birth control and it is not a fertility app. It does not diagnose anything, it does not tell you what your body should be doing, and it is not a medical device. It is a general wellness app that records what happened and shows it back to you. Terms of Use: https://digitalnafta.com/meridian/terms.html Privacy Policy: https://digitalnafta.com/meridian/privacy.html
Screenshots
Verdict
The clearest difference is iOS requirement: Perimo at 15.0 against Meridian's 26.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Perimo sells 2 in-app purchases, starting at $9.99 per month and Meridian sells 2 in-app purchases, starting at $13.99 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | Perimo | Meridian |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 71 MB | 26 MB |
| Age rating | 12+ | 12+ |
| Developer | Halil Hilmi | Jan Daniel Naftanaila |
In-app purchases
Perimo
- Premium Monthly7 Days trial$9.991 Month
- Premium Yearly7 Days trial$69.991 Year
Meridian
- Weekly$13.997 Days
- Annual$89.991 Year









