Comparison

Cycle vs Selfletter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Period and ovulation tracking
  • Pregnancy journey companion
  • Symptom and mood logging
  • Customizable reminders
  • Cloud sync across devices
  • Data export
Features
Read full description

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/

About

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.

Highlights
  • 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
Features
Read full description

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

Cycle4 screens
Selfletter4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Cycle ships an update fortnightly, Selfletter every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 7 level
Cycle versus Selfletter: the parameters behind the verdict, then further details
ParameterCycleSelfletter
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyFortnightlyEvery 4 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better17.0
Further details — not scored
Size58 MB17 MB
Age rating4+4+
DeveloperLightli LTDAmar Labs Inc.

Customer experience

Cycle

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Selfletter

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Cycle

Subscriptions2
  • Premium · Monthly$1.991 Month
  • Premium · Yearly7 Days trial$14.991 Year
3 purchases

Selfletter

Subscriptions2
  • Selfletter Premium · Monthly3 Days trial$4.991 Month
  • Selfletter Premium · Yearly3 Days trial$29.991 Year
One-time1
  • Selfletter Premium · Lifetime$89.99

Questions

Is Cycle free?
Cycle is free to download, with in-app purchases available.
Is Selfletter free?
Selfletter is free to download, with in-app purchases available.
Which has better reviews, Cycle or Selfletter?
Cycle and Selfletter are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Cycle or Selfletter have ads?
Selfletter shows ads; Cycle does not.
Which is updated more often, Cycle or Selfletter?
Cycle ships an update fortnightly, and Selfletter every 4 days. Most recently, Cycle was updated on October 30, 2026 and Selfletter on October 31, 2026.

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