# Month to Month: Period Log — Period log, no sign-up needed

> Period log, no sign-up needed (iPhone/iPad app by Hyunjin Jang.)

- Source: https://appshunter.io/ios/app/month-to-month-period-log/id6821908963 (this page in markdown: same URL + `.md`)
- Developer: [Hyunjin Jang](https://appshunter.io/developer/6814767316)
- Category: Health & Fitness, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 15.5 · 30 MB
- Languages: American English, Japanese, Korean
- Released: 2026-10-15
- Data updated: 2026-11-06

## What is Month to Month?

Start without an account. Your logs are saved only on this device, and the app shows why it estimated each date.

■ A range, not a single date
- Your next start day appears as a range, such as "Nov 3 – 7"
- "Why this date?" explains your recent cycle lengths and how the estimate is made, in plain words
- Logs that differ a lot from your other cycles are left out of the estimate, and you can add them back yourself

■ Fix a mistake right away
- Tap "My period started" once to log a start day, and undo it right away
- Tap a date to save flow, body, pain, mood, and a note for that day in one place

■ Logs and estimates look different
- On the calendar, logged days are filled bars, the estimated start range is a dotted line, and other logs are small dots
- You can tell them apart by shape, even if colors are hard to see
- If you turn it on in Settings, a fertile window reference appears as a dotted outline on calendar days, with the days around ovulation marked by a small diamond (off by default). It is a reference value calculated from your past logs. Do not use it for contraception or pregnancy planning.

■ When you change phones
- Make a backup file locked with a password you choose, keep it somewhere safe, and restore it on the new phone
- Export and import CSV files

■ Quiet and light
- No sign-up, no community, no shopping
- Reminders arrive around the time you pick, and the lock screen shows only "You have something to check"
- App lock with a PIN or biometrics
- The only permissions are notifications and biometrics, and both are optional

Month to Month is not a medical device and does not diagnose, treat, or prevent any disease or medical condition. Estimated dates are reference values calculated from the logs you enter and may differ from what actually happens. Do not use it for contraception or pregnancy purposes. If something feels wrong with your body, or before making any medical decision, consult a healthcare professional.

Contact: dalmada@hyunjins.co.kr

## Is Month to Month safe?

Not enough ratings yet to assess Month to Month.

## Is Month to Month legit?

Month to Month: Period Log appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Month to Month is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 0.1.4 — 2026-11-01

- Restore logs now opens CSV files from other apps too.
- CSV export now uses your app language.
- Temporary backup and CSV files are removed after sharing.

### 0.1.3 — 2026-10-30

- Month to Month now supports English and Japanese.
- The app language follows your device language.

### 0.1.2 — 2026-10-26

- 예상일 알림을 받을 시각을 고를 수 있어요.
- 생리 중에는 오늘 화면에 며칠째인지 크게 보여 드려요.
- 달력에서 예상일과 오늘을 더 알아보기 쉽게 바꿨어요.

### 0.1.1 — 2026-10-15

- iPad 에서도 넓은 화면에 맞춰 쓸 수 있어요.

### 0.1.0 — 2026-10-15

No release notes.

## More apps by Hyunjin Jang

- [실봄 - 청약알림·실거래가 지도](https://appshunter.io/ios/app/id6815459973)
- [Lift Diary](https://appshunter.io/ios/app/lift-diary/id6815556661)
- [TodayCheck: To-Do & Habits](https://appshunter.io/ios/app/todaycheck-to-do-and-habits/id6815557153)
- [Get Up Already: Mission Alarm](https://appshunter.io/ios/app/get-up-already-mission-alarm/id6815557452)
- [Fasting Notebook](https://appshunter.io/ios/app/fasting-notebook/id6818532649)

All apps by Hyunjin Jang: https://appshunter.io/developer/6814767316

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-06.*