Comparison

Cycle Cipher vs FastOnce

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

Head to head
About

Cycle Cipher

Track your menstrual cycle and health details privately on your device. Log symptoms, moods, and personal health history without creating an account or seeing ads. Secure your data with optional PIN protection and create encrypted backups.

Highlights
  • Local-first data storage
  • Account-free tracking
  • Log period flow, symptoms, and moods
  • Calendar view of cycle history
  • Optional PIN and device authentication
  • Password-encrypted backups
  • On-device reminders
Read full description

Cycle Cipher is a private, local-first period and cycle tracker. Log the details that matter to you without creating an account, seeing ads, or sending health entries to the developer. TRACK YOUR CYCLE - Record period flow and daily notes. - Log symptoms, moods, sexual activity, and basal body temperature. - Review your history in a clear calendar. - See cycle and period-length summaries based on the data you enter. PRIVATE BY DESIGN - Health records stay in the app's local container. - Optional PIN and device authentication protect access. - No advertising, analytics, accounts, or developer-operated cloud sync. - Create password-encrypted backups and CSV copies when you choose. REMINDERS ON YOUR TERMS Choose optional on-device reminders and manage notification permission at any time. Cycle estimates are based only on past entries and may be early, late, or unavailable. SENSITIVE HEALTH HISTORY Privately record pregnancy tests, pregnancy outcomes, provider visits, contraception changes, and related dates. These entries are personal records, not medical guidance. FREE FOR EVERYONE Every feature is available for free. Optional, repeatable tips are processed by Apple and never unlock features or change app behavior. Cycle Cipher does not diagnose conditions, provide treatment, or replace a qualified healthcare professional. Fertility and ovulation estimates are approximate and must not be used as contraception. Seek urgent medical help when you are concerned about severe or emergency symptoms.

About

FastOnce

Features
Read full description

One giant button. That is the whole app. Tap it to start a fast, tap it to end. A real 24-hour clock face shows exactly where your fast sits in the day, not an abstract bar. Available in English, Spanish, French, Arabic, Russian, Hindi and Ukrainian. RAMADAN Switch on Ramadan mode and the timer stops being a number of hours you picked. Your fast runs from suhoor to iftar, worked out on the phone for wherever you are, and both times move a few minutes every day exactly as they really do. Six calculation methods: Umm al-Qura, Dubai, the Egyptian General Authority, the Muslim World League, Karachi and North America. The one used where you are is chosen for you. Everything is computed on the device from your location, so it works with no signal at all and nothing is sent anywhere. Ramadan mode appears in the app as the month comes round. WHY FASTONCE Nearly every fasting app rents you a timer. You answer a quiz, hand over an email, then pay monthly for a clock. FastOnce asks for none of that. No account, no sign-up, and it opens straight onto the button. WHAT YOU GET, FREE A dial that actually reads as time The ring wraps a 24-hour wall clock, so you can see at a glance that your fast ends at 8pm rather than decoding a percentage. Plans that fit your day 12:12, 14:10, 16:8, 18:6, 20:4 and OMAD, or set your own hours. You can also pick the time you want to finish and the length is worked out for you. It keeps going by itself When your fast ends the eating window opens, and when that closes the next fast begins. Weeks can pass without opening the app. Forgot to hit start Backdate the start time and the ring, the stages and every reminder recalculate instantly. Stages, explained in plain language Blood sugar drop, fat burning, ketosis and autophagy, each with a short friendly explanation. No clinical claims, no scare tactics. Your calendar, your streaks, your totals A month calendar of completed fasts, current and longest streaks, and your totals. Free, and staying free. Gentle nudges, only if you want them Optional pings at the halfway mark, at each stage, when your fast completes, and short encouragement while you are in it. Quiet overnight. A home-screen widget Your current fast at a glance without opening anything. FASTONCE PRO, ONE PAYMENT Pro is a single purchase. No subscription, nothing renews. It adds three things and nothing else: Charts and trends Hours per day, how often you reach your goal, your weekly average, and the hour you actually start. Export your log Every fast you have finished, as a spreadsheet file that leaves the app and is yours to keep. Still no account, still offline Pro changes what you can see, not where it lives. PRIVACY No account, no analytics, no advertising, no server of ours. Nothing you record ever leaves your iPhone, and neither does your location. The only time FastOnce talks to anything is when you buy Pro, which goes through the App Store. FastOnce shares general wellbeing information, not medical advice. Talk to a doctor before changing your eating habits.

Screenshots

Cycle Cipher4 screens
FastOnce4 screens

Verdict

The call

The clearest difference is update cadence: FastOnce at every 6 days against Cycle Cipher's monthly. 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Cycle Cipher ships an update monthly, FastOnce every 6 days. The most recent releases landed on September 22, 2026 and September 9, 2026 respectively.

Scorecard1 real difference · 8 level
Cycle Cipher versus FastOnce: the parameters behind the verdict, then further details
ParameterCycle CipherFastOnce
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyMonthlyEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size4 MB6 MB
Age rating17+4+
DeveloperOMAR DANIEL GRAZIANOAndrii Zakharov

In-app purchases

None

Cycle Cipher

No in-app purchases

None

FastOnce

No in-app purchases

Questions

Is Cycle Cipher free?
Cycle Cipher is free to download, with no in-app purchases.
Is FastOnce free?
FastOnce is free to download, with no in-app purchases.
Do Cycle Cipher or FastOnce have ads?
Neither Cycle Cipher nor FastOnce shows ads.
Which is updated more often, Cycle Cipher or FastOnce?
Cycle Cipher ships an update monthly, and FastOnce every 6 days. Most recently, Cycle Cipher was updated on September 22, 2026 and FastOnce on September 9, 2026.

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