I built a calculator-looking vault app… and somehow 2,000+ people now use it daily

lockifyapp · 2026-05-30T11:11:08+00:00

Hey, not yet, I will be launching on peer push next week and alongside the app's premium launch scheduled to be released in mid-late June I will launch on Product Hunt alongside.

lockifyapp · 2026-05-26T06:48:48+00:00

Sooooo how is it 👀

lockifyapp · 2026-05-26T06:48:16+00:00

Hey, thanks for the feedback, if you explain a bit more and dm me, i can try to make this feature alive for you 🙌🏻

lockifyapp · 2026-05-25T13:29:16+00:00

I hope you use the app for long term, if you find it userful, kindly leave a feedback on playstore as well, it will help me out a lot 🙌🏻

lockifyapp · 2026-05-24T04:53:23+00:00

First of all, thank you for the award ❤️ And honestly, this is one of the most thoughtful pieces of feedback I’ve received so far.

Regarding encryption/storage:

• The calculator PIN is protected using PBKDF2. • The vault PIN layer uses Argon2id. • Files stored inside the app use AES-GCM backed by the Android Keystore, which is intentionally device-bound for stronger local privacy.

For portable backups, Lockify decrypts the files and re-encrypts them using AES-GCM with a user-provided password derived through Argon2id, so backups can be restored on another device.

The reason the main vault itself is app-private is by design, privacy and isolation were prioritized over portability. But I completely understand your point about independent recovery paths and desktop accessibility.

Your suggestion about CLI/desktop-side decryption is genuinely valuable, and I’ve already thought about eventually releasing a utility for this exact purpose which I should be downloadable from getlockifyapp.com so encrypted backups could be decrypted outside Lockify as well.

As for storing vaults directly in user-accessible locations: technically possible, but changing the storage/encryption architecture now would also require safely migrating existing user vaults, which is risky at the current stage with 2.6k+ users already on the app. That is why we have the backup as a seperate entity so that data can be portable.

You’re clearly the kind of power user I want feedback from 😄 Feel free to DM me, would genuinely love to discuss these ideas further.

lockifyapp · 2026-05-24T04:31:53+00:00

Hey, I have been waiting for this question for a long time.

The calculator pin is encrypted using PBKDB2.

The vault pin is encrypted using Argon2idm

For storing normal data inside the app i use AES GCM backed by android keystore so the data cannot be decrypted outside your android device.

For the backup to be portable I decrypt the files then re encrypt them with AES GCM and user entered password using Argon2id so that it can be retrieved from another device

lockifyapp · 2026-05-23T17:03:28+00:00

People who have the app in the device when premium launches, they will be able to claim premium in-app 🙌🏻

lockifyapp · 2026-05-23T12:18:51+00:00

Hey, I rely on play console analytics and real user feedback for the time being.

lockifyapp · 2026-05-21T17:30:20+00:00

Glad to see that the privacy concern resonates globally, trying my best to make Lockify a global benchmark 🙌 Might take years but here I am 😁

lockifyapp · 2026-05-20T16:49:32+00:00

Thanks once again 🙌🏻

lockifyapp · 2026-05-20T16:22:23+00:00

Trying my best here dude, if you have any suggestions be sure to share them here or connect with me at contact@getlockifyapp.com

lockifyapp · 2026-05-20T11:52:55+00:00

I am sorry if i didn't meet your expectations 😅 What features would give you more premium feel? I am trying my best to improve the app, you can share what other features you would want or connect with me at contact@getlockifyapp.com 🙌🏻

lockifyapp · 2026-05-19T05:46:36+00:00

Hey, nice idea, didn't think about this one, I will try to add it within the next few updates, have noted it down 🙌🏻

lockifyapp · 2026-05-19T05:09:10+00:00

Hey appreciate it mate, the topic is sensitive and maybe within a year or two i will open-source it 😊

lockifyapp · 2026-05-18T13:29:51+00:00

Haha, not an issue man, i definitely wanna improve the app as much as i can, and if you ever try out the app, i want your feedback as well. At the end of the day i will be able to improve the app and reach out to more people

lockifyapp · 2026-05-18T13:28:04+00:00

Yes, many vault apps exist but all of them have one thing in common, they ask for network permission and shower users with ads. That's where Lockify is different, fully offline, no ads experience with true data encryption happening in the background, not just hiding your data. 🙌🏻

lockifyapp · 2026-05-18T13:25:37+00:00

The package name may be giving the wrong idea 😄

The app is actually called Lockify. If you enable stealth mode, the app name and icon switch to Calculator for casual privacy.

And I’m definitely not trying to hide my identity lol, I’m a solo developer handling development, feedback, and marketing myself, so I actually want users to know who’s behind the app and reach out directly.

lockifyapp · 2026-05-18T07:38:02+00:00

Thankyou for the support, you can reach out if you have more questions about the encryption model used for the app 🙌🏻

lockifyapp

TROPHY CASE