Life & fun · alternatives · 2026
24 alternatives to Simpluna
I've been running Simpluna, a period-tracking app, for six years. It's a company based in Tokyo, Japan, but development and operations are basically a one-person effort. The app is built with React Native (Expo). The defining trait of the app is that it's simple, with no unnecessary features. Recording periods, calculating predictions, and sending notifications — that's the core of it. This space is dominated by big players (Flo, Clue, and in Japan, Luna Luna). Building something similar would have been hopeless, so I made the things those apps don't have my selling point. Optional features…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Simpluna launched in 2021; newer entries below may have overtaken it.
- 1IM
Hey HN, after the app I actually used to track my period wanted me to log in and save my data in the cloud, I decided to write my own. Most apps in this area are based on a subscription model and display far too much information anyway. For me, a simple calendar is enough where I can add a few notes if necessary. So that is the result of my work - a simple design and the data is only saved on the smartphone.
2024 · play.google.com · its alternatives →
- 2
Easy to use period tracking app that respects your privacy
2024 · play.google.com · its alternatives →
- 3
Privacy-first period calendar with smart predictions 📅
2020 · period-calculator.com · its alternatives →
- 4
- 5
Lotus▲92A calendar to help women’s track their menstrual cycle
2017 · apps.apple.com · its alternatives →
- 6
- 7
- 8
Your period data never leaves your phone. 100% private.
Nov 2025 · apps.apple.com · its alternatives →
- 9
- 10IO
Look, every journaling app out there wants you to organize things into folders and tags and templates. I just wanted to write something down every day. So I built this. One note per day. That's the whole deal. - Can't edit yesterday. What's done is done. Keeps you from fussing over old entries instead of writing today's. - Year view with dots showing which days you actually wrote. It's a streak chart. Works better than it should. - No signup required. Opens right up, stores everything locally in your browser. Optional cloud sync if you want it - E2E encrypted with AES-GCM, zero-knowledge,…
Mar 2026 · its alternatives →
- 11
Private pregnancy tracker. No cloud, no accounts.
Jun 2026 · getzorya.app · its alternatives →
- 12
- 13
Hi HN, I’m full stack developer (formerly iOS) and I just launched Nomad Tracker, a native iOS app to help digital nomads track physical presence across countries for visa limits and tax residency. Key idea: everything runs on-device. No accounts, no cloud sync, no analytics. Features: - Calendar-based day tracking per country. - Schengen 90/180 and other visa “runways”. - Fiscal residency day counts and alerts. - Optional background location logging (battery-efficient, never overwrites manual data). - Photo import using metadata only (no image access). - On-device “Fiscal Oracle” using…
Feb 2026 · thenomadtracker.com · its alternatives →
- 14IB
There’s something quietly unsettling about how normal it's become to hand over our most personal data to apps that barely deserve our trust. My wife once showed me a notification she got from her period tracking app. At first, it seemed like a simple reminder. But then came the ads. Not long after, she started getting eerily specific suggestions on other platforms. Things she hadn’t searched for. Things that felt too close. Somewhere, her cycle had been turned into a data point. That bothered me more than I can explain. These apps promise helpful insights. But in return, they take so much.…
2025 · its alternatives →
- 15
I initially released this as just an IOS app. Since then it has been growing steadily but a lot of people have emailed asking for a web / android version. It took me nearly 2 months to build a version for the web. The nice thing about using Convex as my backend is that all the data is always synced between the app and web. I do not have to setup any syncing logic. The moment you change something in the app, it will reflect on the web version in realtime. I know there are loads of these kind of tools online but it's starting to feel like mine is actually starting to differentiate itself…
2025 · three-cells.com · its alternatives →
- 16
Understand each other better
Nov 2025 · play.google.com · its alternatives →
- 17
I kept trying to explain how important outdoor light is and how most people aren’t getting enough. Eventually I figured that showing is more effective than telling. So we built a free app that uses your Apple Watch or iPhone to automatically track your light exposure throughout the day. It tells you if you’re getting enough, shows you how consistent you are, and rewards habits that support hormone balance. It's in beta on TestFlight, let me know what you think!
2025 · lumehealth.io · its alternatives →
- 18
Hello, For quite some time, I've been unsatisfied with the built-in timers on both Android and iOS; especially for workouts, when I needed to set up a configurable number of series with rest periods in between. That's when I started thinking about building something myself. It was just a timer and I said to myself "how hard could it be?", I had no idea. The first iteration of the project worked "just fine", but the UI was an eyesore (even more than it is now), and the UX was quite awful as well. As you can probably guess, I'm not versed in design or front-end development. In fact, my last…
Nov 2025 · mytimers.app · its alternatives →
- 19
- 20
AI-powered period tracking for real cycles
Jun 2026 · myperiodai.com · its alternatives →
- 21
Lunara▲3A private period tracker that never leaves your iPhone
Jun 2026 · ashvara.io · its alternatives →
- 22
Chronoid▲51Hi HN, I've been building Chronoid, a native macOS time tracker. It runs in the menu bar and automatically logs apps, windows, and file activity using macOS accessibility APIs. Everything is stored locally, no sync or cloud service. At first I tried using DuckDB as the storage engine. It looked promising for analytics, but after ~2 weeks I realized it was overkill for my needs—extra dependencies, trickier integration, and not much real benefit at the scale of a single-user app. I switched to SQLite, and it turned out to be the simpler, more reliable choice. The codebase got smaller and the…
Nov 2025 · chronoid.app · its alternatives →
- 23
The private period tracker that grows with every cycle
Aug 2026 · simply-track.com · its alternatives →
- 24
Track your menstrual cycle effortlessly with Luna
2025 · play.google.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →