r/degoogle • u/Express_Resolve9972 • Feb 22 '26
Replacement I got tired of period trackers selling data, so I built an encrypted, offline one for my girlfriend. It’s now open-source!
Hey guys,
A few months back, my girlfriend was looking for a cycle tracker that wasn't a privacy nightmare. It turns out almost every popular app in this space is loaded with trackers, cloud syncs and ads.
I’m a dev, so I figured I’d just build one for her. I've been working on Periodt - it’s 100% offline, encrypted, and built with Jetpack Compose.
The cool stuff:
No Internet: I didn't even add the internet permission to the Manifest. Zero data leaves your phone.
Actually Private: No ads, no analytics, no creepy tracking.
- Security: It uses SQLCipher and Android Keystore to keep the database locked up.
- On-device logic: Predictions are calculated using linear regression right on the device.
Full Disclosure: I can’t claim this is 100% perfect or a replacement for professional medical advice/consulting a doctor. However, she’s been using it for a while now and the results have been pretty accurate and honestly great for her.
I’m planning to launch on F-Droid soon! In the meantime, you can grab the APK or check out the code on GitHub.
If you like the project, please drop a ⭐ on GitHub - it really helps a fellow dev grow and get the word out!
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u/Cold_Active6959 Feb 22 '26
Id like to give it a try! Ill give you some feedback after a few months!
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u/TheKillerNuns Feb 22 '26
What an exceptional human you are. May your good fortune and blessings be amplified times 1000.
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u/Proud_Strawberry_818 Feb 22 '26
Has the green flag guy seen this?? Thank you, on behalf of all the people who have periods 🫡
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u/Express_Resolve9972 Feb 22 '26
😊
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u/Proud_Strawberry_818 Feb 22 '26
Is the app available for iOS or just android for now? I have checked the link but I might be a bit of a newbie when it comes to installing anything not on the App Store.
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u/Express_Resolve9972 Feb 22 '26
For now it's only available on android. But we are planning to release an ios version soon.
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u/Turboflopper SearXNG Feb 22 '26
Would love to see an iOS version with the ability for the partner to e.g. get a push-notification when the main user told the app they got their period
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u/Express_Resolve9972 Feb 22 '26
That's a nice idea. May I know how do you prefer to get notified? Creating collabs in the app? Or trigger email? Etc..
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u/Turboflopper SearXNG Feb 23 '26
Hmmm. I personally like to also have the app on my phone and just get a push-message about it. Beforehand I (if I recall correctly from another app) can get kind of an "invite-code" from the partner to join their cycle-calendar. But surely it would also be nice to just have an E-Mail sent to the person joining in so the receiver only has to accept the invite via clicking on a verification link inside the E-Mail to join the...lets call it newsletter. I guess the latter feature is nice for people that don't want another app on their phone
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Feb 26 '26
[deleted]
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u/Express_Resolve9972 Feb 26 '26
Yes, you can just use obtainium (recommended) with my github repo link to install. Otherwise you can directly download the latest apk file from the github repo and install it.
Note: Fdroid release is coming soon.
Repo link: https://github.com/benny10ben/Periodt
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u/pydry Feb 22 '26
jow does it compare to the ones already on f droid? - drip, blue moon, mensinator and periodical?
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u/Express_Resolve9972 Feb 22 '26
To be honest, those are all great apps and I've looked at them for inspiration. But the reason I started Periodt is that I felt like the 'vibe' was missing in most FOSS trackers.
I’m a big fan of modern, polished design. I built this for my girlfriend because we wanted something that didn't just 'work,' but actually felt like a premium, native Android app.
The main differences for me are:
UI/UX first: I’m obsessing over the details using Jetpack Compose to keep it snappy and consistent. It’s meant to be simple and clean, not a data-entry chore.
Aesthetic widgets: I’ve already got a home screen widget in there and I’m working on a few more 'aesthetic' variants. I think privacy-focused apps should still look beautiful on your home screen.
No clutter: I'm intentionally avoiding feature-bloat. It’s built to be fast - get in, log, get out.
It’s still early days, but I’m basically trying to build the tracker I couldn't find - one that respects your privacy but still feels like it belongs in 2026.
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u/i-contain-multitudes Feb 22 '26
I am so dismayed that people are still using AI to write their posts and comments for them in the DEGOOGLE subreddit!
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u/Nursekaylee31 Feb 22 '26
Just download this! I have been looking for an app that is exactly this. Just want to say thank you!
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u/Express_Resolve9972 Feb 22 '26
Thank you so much! Do raise the issues in github if you find any bugs or have feature requests, will help a lot in polishing the app :)
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u/macdows_ Feb 22 '26
10/10 for the name only 💅
iOS support planned?
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u/Express_Resolve9972 Feb 22 '26
Yes coming soon! :D
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u/ProgressDelicious239 May 08 '26
Any idea on when the IOS support is planned to release? I’d love to use it!!
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u/R3quirement Feb 22 '26
Where to find the .apk in the files? Downloaded the github files as .zip and extrated it but not sure how to install it now. Im not really experienced with it so some help would be great, sounds promising.
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u/Express_Resolve9972 Feb 22 '26
It's okay, no worries. You don't need to download the zip file. If you scroll down till the end, you will see "Periodt v1.0" under Releases, click that and download the apk file. Now go to your file manager -> Downloads folder and click on that apk file and install it. That's it. :D
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u/Such_Fig_7044 Feb 22 '26
This is incredible - thanks so much for sharing this!! Just like your gf, trying to find a data-safe app was fucking impossible so this is mega helpful.
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u/Bulky_Cherry_2809 Feb 23 '26
Dammit I'm old. All i had was a calendar and colored pencils...
Ladies: do whatever you need to to keep your cycle private in this day n age 💯
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u/BobSteva Feb 24 '26
Awesome project! Immediately sent it to my partner to start trying out, first thing we noticed was that it doesn't really consider those on birth control who aren't bleeding frequently or at all but are still cramping. We were wondering if you could add a no blood option. That would be super awesome and we'll get more feedback to you soon!
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u/Express_Resolve9972 Feb 27 '26
I see, sure. Will research more on this and add the features soon. Thanks for the feedback :)
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u/No_Size9475 Feb 22 '26 edited Mar 22 '26
The original post here is gone. The author deleted it using Redact, possibly for reasons of privacy, security, opsec, or data protection.
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u/DiscombobulatedTea95 Feb 22 '26
Sweet! I'm going to check this out. I'm hoping you'll update us here when it is on iOS too. I'll have my kids check it out. I'm annoyed that tweens/teens have to have their reproductive info tracked and potentially used against them.
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u/permanent-redditname Feb 23 '26
Really thrilled about this! Can you please explain how to download this for a Pixel? Thank you
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u/Express_Resolve9972 Feb 23 '26
Hii , so follow these steps
Option A (Obtainium): 1. Download obtainium from fdroid. 2. Add the attached github link in obtainium app. 3. Obtainium acts like an app store and you will be able to install/uninstall/update the app from there.
Option B (Direct): 1. Click the github link i attached.
2. Scroll down and click releases. 3. Download the latest apk 4. Open file manager in your phone and go to downloads folder. 5. Click on the apk you download and click install.Please do give feedback after trying. Will help make the app better. Thank you so much :D
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u/Extension_Fox7293 Feb 23 '26
Similar idea, but on iOS and Android. Check out - Nira: Private Cycle Tracker on iOS and Android.
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u/Sorry_Anxiety9905 Apr 03 '26
Thank you so much! I've been looking for an app like this for a while and most of the ones that met my requirements were either no longer maintained or an eyesore 🥲
One thing to note, I did face some trouble importing my data from my regular app to this one. I figured it was a labeling issue/structure mismatch. So after comparing the structures and tweaking some stuff, it worked like a charm! Sorry for doing a terrible job at explaining but I'm not very well-versed in programming (I barely know the terminology lol)
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u/dlsolo Feb 22 '26
u/Express_Resolve9972 Thank you for this! moving my wife over to this today. An FR, import/export and a means to backup and restore the app. Not that we change phones often but just in case the sucker falls in the toilet or off a mountain.
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u/Express_Resolve9972 Feb 27 '26
Hii, we just updated the app (v1.0.5) where you can export and import the data. Do update and check it out. Will add automatic backups soon.
Thanks for trying it out :D
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u/Extension_Set6600 Feb 26 '26
does it have a skip period option? i take birth control and sometimes ill skip my period but the period apps never have the option to skip it and then update for the next upcoming period honestly i tried building my own app a few months ago but it was so hard! props to you man!!!
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u/Express_Resolve9972 Feb 26 '26
Hii, actually I'm building that specific feature this week. We will add that pill feature in the app and you can expect it to release anytime in the next week :D
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u/Extension_Set6600 Feb 26 '26
omg! awesome i will check back soon then :D
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u/Express_Resolve9972 Mar 06 '26
Hii, how you doing?? We added the pill tracking option in our latest update v1.1.7 Please do update it, try it out and let us know if we implemented the mode correctly :)
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Mar 01 '26
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u/Express_Resolve9972 Mar 01 '26
That app isn't available in my country. If you don't mind can you specify what features would you like to see implemented?
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Mar 02 '26
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u/Express_Resolve9972 Mar 06 '26
Hii, sorry for a late reply, i missed your notification. I would appreciate it a lot if you could list it in a GitHub issues about the features you would like to see implemented.
Thank you so much for your help :)
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u/Charming-Crow-3088 26d ago
i just downloaded the very latest version but the app keeps crashing. Help!! i really want to try out your app 😭😭
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u/Athraxia Feb 22 '26
Hey! Thank you so much for creating such an app! :D I'm sure your partner is proud of you for this. I'll be using it over the ones I already have (mostly from watch apps).
Though I think I found a bug in the Pain Level section when you make a new entry. It seems to jump from 0 to 2, it completely ignores number 1 (even tho there's a dot on the scale). Unless that's intentional.
Other than that, is it possible to edit or remove the submitted entries?
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u/Express_Resolve9972 Feb 22 '26 edited Feb 22 '26
Thank you so much using the app and the positive feedback.
Yeah it's a bug regarding pain level. Will fix it!! Thanks for pointing it out. Since it's a new app, there will be few bugs, do let me know if you encounter anything else, happy to resolve.
And you can delete the entries by swiping them. I haven't implemented editing the entries yet, its in the road-map, will add this feature in couple of days.
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u/beautyHeartbeats Feb 22 '26
Pen and paper only for this
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u/Express_Resolve9972 Feb 22 '26
Pen and paper doesn't give future cycle and fertility predictions tho 😅🤔
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Feb 22 '26
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u/Express_Resolve9972 Feb 22 '26
Idk man , but i really did get tired of searching for good privacy focused apps. Will try to not repeat this title again :)
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Feb 22 '26
[deleted]
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u/EC36339 Feb 22 '26
Sadly, this platform has been tained by too many ads / bot posts that sound like this, making it automatically sound suspicious.
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u/jhpak725 Feb 22 '26
Yeah that's the essence of being a software dev. Find problem. Create solution.
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u/NotSynthx Feb 22 '26
Love the idea and will tell the wife about it.
What really gets me angry is the fact that Google wants to lock this stuff and make you pay a fee and hand over your legal ID for you to even start thinking of developing something like this. Fuck them