My Data1 vs Stay SAYF
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
My Data1
This app lets you create and encrypt notes locally on your device. It also helps you securely hash your passwords before using them on other websites or apps, protecting your sensitive information.
- Local note creation
- Markdown formatting
- Password encryption/hashing
- Data privacy
- Secure password management
Read full descriptionHide full description
My Data1 allows users to create notes locally and encrypt their password Nowadays, data is considered as the new oil of the digital economy. Every hour of every day, our digital interactions are being recorded and logged. So it's better to keep it encrypted and locally. ## Features. - Users can format their notes using the Markdown syntax which is a lightweight markup language. - Allows users to encrypt/ hash their password before using it in other websites or apps. This is because some websites or apps they don't encrypt the users' password on their server, instead, they keep it as plain text. So you should encrypt (or hash) your password before using it.
Stay SAYF
Read full descriptionHide full description
SAYF is the personal safety companion that gives you peace of mind โ whether you're walking home alone, going on a first date, or heading out after dark. Tell SAYF where you're going and who to contact, then get on with your evening. SAYF quietly monitors your journey in the background and steps in the moment something seems wrong. HOW IT WORKS Set up a session in under 30 seconds. Choose a trusted contact, pick your mode, and SAYF takes care of the rest. โข Walking home โ SAYF tracks your route and automatically checks in with you at regular intervals. Miss a check-in and it nudges you. Miss two, and it quietly alerts your contact that you haven't responded. โข On a date โ SAYF sets a time-based check-in alarm. If you don't tap "I'm safe" when the timer fires, it sends your contact a discreet heads-up. Ideal for first dates or meeting someone new. โข En route โ Set your destination and SAYF watches for your safe arrival using background GPS. When you get there, it notifies your person automatically. No tapping required. SMART CHECK-INS SAYF uses SMS-based check-ins so your trusted contact can respond with a keyword โ no app required on their end. They can confirm they've seen your session start, acknowledge alerts, or signal they're on their way. Everything is handled automatically. HOLD TO ALERT In an emergency, hold the alert button for 1.5 seconds. SAYF immediately sends text and email alerts to all your trusted contacts with your name and a request to call you right away. CONTACT ALERTS Your trusted contact is kept informed automatically via SMS and email โ no app required on their end. They're notified when your session starts, alerted if something seems wrong, and told when you arrive safely. YOUR PRIVACY, PROTECTED Your location never leaves your device unless you're in an active session. SAYF doesn't sell your data, doesn't build profiles, and doesn't share anything with third parties. Location is used only during active sessions. Full details at our privacy policy. DESIGNED FOR REAL LIFE SAYF works with your phone locked and in your pocket. There are no subscriptions, no hidden fees, and no account required โ just open the app and go. Perfect for: โข Walking home after a night out โข First dates and meeting strangers โข Late-night commutes โข Solo travel โข Anyone who wants a quiet safety net Download SAYF and walk home with confidence.
Screenshots
Verdict
The clearest difference is update cadence: Stay SAYF at daily against My Data1's every 2 weeks. My Data1's advantage is iOS requirement (9.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
My Data1 ships an update every 2 weeks, Stay SAYF daily. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.
| Parameter | My Data1 | Stay SAYF |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | โ |
| Update frequency | Every 2 weeks | Daily โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | โ |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPod |
| Requires iOS | 9.0 โ better | 15.1 |
| Further details โ not scored | ||
| Size | 59 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Tuan Duong | Leigh Keates |
In-app purchases
My Data1
No in-app purchases
Stay SAYF
No in-app purchases









