Cycle vs Selfletter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cycle
This app helps you track your menstrual cycle and pregnancy journey with a calm, weather-inspired interface. It offers predictions for periods and ovulation, symptom logging, and pregnancy milestones. Plan your life around your body's rhythms with helpful insights and reminders.
- Period and ovulation tracking
- Pregnancy journey companion
- Symptom and mood logging
- Customizable reminders
- Cloud sync across devices
- Data export
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See where you are in your cycle or pregnancy at a glance. Cycle brings period tracking, estimated ovulation and fertility windows, symptoms, reminders, pregnancy milestones, and postpartum tracking into one calm, weather-inspired view. Log periods, flow, symptoms, moods, intimacy, and pregnancy updates in one place. Look back through your calendar to understand patterns over time, with an experience that stays clear and low-pressure. FOLLOW YOUR CYCLE · See your cycle through a calm, weather-inspired view · Log periods, flow, symptoms, and moods · View estimated period, ovulation, and fertility windows · Set reminders for periods, ovulation, and self-care · Review your cycle history from the calendar PREGNANCY AND POSTPARTUM · Follow your due date and pregnancy timeline · See weekly progress and pregnancy milestones · Keep track of pregnancy symptoms and updates · Move into postpartum mode after birth EVERYDAY EXTRAS · Cloud sync across devices · Keep using supported features if your connection drops briefly; changes sync when you're back online · Clean, distraction-free design · Light and dark modes · Data export PREMIUM Premium adds daily cycle notes and tags with search and multi-select filters, detailed historical insights and charts, additional colour themes, and a home screen widget for your current cycle or pregnancy overview. LANGUAGE SUPPORT Cycle is available in 31 localizations. HEALTH NOTE Cycle is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. Cycle and fertility estimates are for information only and should not be used as contraception or medical advice. Cycle is part of Lightli, a family of minimal yet playful apps. By using this app, you agree to Lightli's Terms of Use and Privacy Policy. Terms: https://lightli.uk/terms/ Privacy: https://lightli.uk/privacy-policy/
Selfletter
This app allows you to write letters to your future self, to be delivered the next day, week, month, or even years later. It functions as a private diary that reflects on your present and anticipates your future.
- Write letters to your future self
- Time capsule feature for delayed delivery
- Daily letter delivery
- Private storage on device and iCloud
- Searchable letter archive
- Customizable paper styles
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Write a letter to tomorrow-you tonight — and the next evening, open it. Selfletter is your nightly letter across time: today's hopes, worries, and reminders, delivered to the person you wake up as. It's a diary that meets you the next day. Reflect on today on one side, write to tomorrow on the other, and seal the night. When evening comes again, last-night-you is waiting with a letter just for you. Some nights, write further ahead. Seal a letter in a time capsule that won't open for a week, a month, or years — a gift to your future self that arrives exactly when you need it. Over time, your letters fill a quiet year you can look back on. • Write tonight, read tomorrow — a letter from past-you, every evening • Time capsules — seal letters for weeks, months, or years ahead • A year of you — a calendar of your nights, plus "a year ago tonight" • Yours alone — letters live on your device and iCloud, fully private • Search every word, choose your paper, and fill in any night you missed Tonight's letter is waiting. Write to tomorrow-you — and see what tomorrow brings. Selfletter. A letter to tomorrow, every night. — — — Privacy Policy: https://gurshanmann246.github.io/selfletter-pages/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://gurshanmann246.github.io/selfletter-pages/terms/
Screenshots
Verdict
The clearest difference is ads: Cycle at none against Selfletter's shown. Selfletter's advantage is update cadence (every 4 days vs fortnightly). On price, rating, ratings volume and in-app purchases 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. Cycle sells 2 in-app purchases, starting at $1.99 per month and Selfletter sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Cycle against 5.0 for Selfletter. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Cycle ships an update fortnightly, Selfletter every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Cycle | Selfletter |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 58 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Lightli LTD | Amar Labs Inc. |
Customer experience
Cycle
Selfletter
In-app purchases
Cycle
- Premium · Monthly$1.991 Month
- Premium · Yearly7 Days trial$14.991 Year
Selfletter
- Selfletter Premium · Monthly3 Days trial$4.991 Month
- Selfletter Premium · Yearly3 Days trial$29.991 Year
- Selfletter Premium · Lifetime$89.99









