Comparison

Keys vs Note To Self Mail

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Keys

Store Credential with Ease

Free

📊 Productivity

★ 4.8288 ratingsView app →

Note To Self Mail

Fastest notes taking to email

Free

📊 Productivity

★ 4.8377 ratingsView app →

About

Keys

Securely store and manage your passwords with military-grade encryption. This app offers iCloud sync, Touch ID support, and automatic locking for enhanced security. It provides essential password management features in a simple, easy-to-use interface.

Highlights

iCloud Sync
Touch ID Unlock
AES-256 Encryption
Local & iCloud Backup
Searchable Items
Automatic Clipboard Clean

Features

Read full description

◆◆◆◆◆iCloud Sync and Touch ID◆◆◆◆◆ A password manager combining the military grade security with simplicity. Just provide the essential feature set for password management. You just know how to use all the features when you open it! √ iCloud Sync between Mac and iOS (Requires In-App-Purchase) √ Support Tounch ID to unlock √ Complete encryption solution: AES-256 + Salt + PBKDF2 √ Local and iCloud data backup and restore √ Sorted and indexed item list √ Searchable item √ Automatic lock when switching to other application √ Automatic clean password from clipboard after 3 minutes Free version contains ads and has all the features in the full version.

About

Note To Self Mail

Quickly capture your thoughts and send them directly to your inbox. This app integrates with popular to-do list applications, streamlining your workflow by sending notes via email. It offers basic note-taking with advanced features available in the pro version.

Highlights

Send notes directly to inbox
Integrates with Trello, Evernote, etc.
Attach photos (pro)
Create sketches (pro)
Attach audio notes (pro)
Scan documents (pro)

Features

Read full description

"Note To Self Mail" is the fastest app for your notes. You can send your notes directly into your inbox, fast and without much effort and detours. "Note To Self Mail" was designed to support mail import for your favorite todo apps like Trello, Evernote, Wunderlist, Any.do, Todoist and many more. The app is not intended to manage your notes, but it offers everything you expect from a note app: - Writing notes - Attaching photos or files (pro version) - Creating sketches (pro version) - Attach audio notes (pro version) - Scan documents (Pro-Version) To make things easier and more flexible: you can use different e-mail addresses as recipients and connect to your own e-mail account for sending. Suggestions or feedback? support@note2selfmail.app Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Keys4 screens

Note To Self Mail3 screens

Verdict

The call

The clearest difference is update cadence: Keys at every 2 weeks against Note To Self Mail's every 6 weeks. Keys also leads on iOS requirement (8.0 vs 12.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Keys sells 2 one-off in-app purchases and Note To Self Mail sells 3 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Keys against 4.8 for Note To Self Mail. Both are backed by a comparable volume of ratings — 288 and 377 respectively. Written reviews are what separate them: 83% of Keys's written reviews are positive against 90% of Note To Self Mail's.

UpkeepUpdate frequency

Keys ships an update every 2 weeks, Note To Self Mail every 6 weeks. The most recent releases landed on October 15, 2026 and October 21, 2026 respectively.

Scorecard2 real differences · 8 level

Keys versus Note To Self Mail: the parameters behind the verdict, then further details
Parameter	Keys	Note To Self Mail
Price	Free	Free
Rating	4.8 (288 ratings)	4.8 (377 ratings) — better
Positive reviews	82.7% of reviews	90.2% of reviews — better
Number of ratings	288	377 — better
Update frequency	Every 2 weeks — better	Every 6 weeks
Ads	No	No
In-app purchases	Yes	Yes
Monetization	Free with in-app purchases	Free with in-app purchases
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	8.0 — better	12.0
Further details — not scored
Size	9 MB	85 MB
Age rating	4+	4+
Developer	天舟陈	Mathias Lipowski

Customer experience

Keys

All ratings288 ratings

Positive96.9%

Neutral1.0%

Negative2.1%

Written reviews98 reviews

Positive82.7%

Neutral7.1%

Negative10.2%

Note To Self Mail

All ratings374 ratings

Positive96.3%

Neutral0.0%

Negative3.7%

Written reviews122 reviews

Positive90.2%

Neutral1.6%

Negative8.2%

User reviews

Keys

From 288 App Store ratings

What we love

👍 Simple and easy to use
👍 Handy and convenient
👍 Saves effort remembering passwords
👍 Secure and user-friendly
👍 Good organization

Room to improve

🐛 App locks up when retrieving passwords
🐛 Lost all passwords
🐛 Cannot access data after iOS update
🐛 App crashes
🐛 No contact info for assistance

Note To Self Mail

From 377 App Store ratings

What we love

🚀 Extremely fast and quick to use
👍 Simple and intuitive interface
⚙️ Highly customizable settings and options
🔒 Secure SMTP-based email delivery
📧 Seamless email integration with multiple accounts

Room to improve

🐛 Google OAuth authentication issues
🔐 Requires SMTP server configuration (technical barrier)
⚠️ Occasional reliability issues after extended use
📱 Limited Apple Watch support
🌐 Browser sharing functionality sometimes fails

Bugs and requests

Keys

Reported bugs

6 issues

App locks up when retrieving passwords
Lost all passwords
Cannot access data after iOS update
App crashes
App crashes every time it's opened

Show 1 more

Cannot open the app after iOS update

Requested features

9 requests

Add color coding for text
Add underline for text
Add account type classification
Make it easier to find in the App Store
Add option to lock password field to prevent accidental changes

Show 4 more

Add folders for organization
Improve synchronization speed
Make master password reset easier
Add more secure password generation options

Note To Self Mail

Reported bugs

7 issues

Google OAuth doesn't work properly
Messages stuck in outbox with Google authentication
App stops working after several weeks of use
Safari share extension crashes or fails silently
Browser sharing shows grey rectangle and fails

Show 2 more

Music playback stops when sending notes
Exchange server incompatibility

Requested features

8 requests

Scheduled/delayed send functionality
Apple Watch native app
Document scanning with PDF export
YouTube title preservation in sharing
iOS 26 UI updates

Show 3 more

Improved browser extension performance
Pop-up interface option instead of full screen
Better Exchange server support

In-app purchases

2 purchases

Keys

One-time2

Remove Ads$0.99
Get iCloud Data Sync$2.99

3 purchases

Note To Self Mail

Subscriptions1

Buy me a coffee$4.991 Year

One-time2

Pro Version$4.99
Buy me a coffee$4.99

Questions

Is Keys free?

Keys is free to download, with in-app purchases available.

Is Note To Self Mail free?

Note To Self Mail is free to download, with in-app purchases available.

Which has better reviews, Keys or Note To Self Mail?

Note To Self Mail is rated higher. Keys averages 4.8 out of 5 from 288 ratings, while Note To Self Mail averages 4.8 from 377 ratings.

Do Keys or Note To Self Mail have ads?

Neither Keys nor Note To Self Mail shows ads.

Which is updated more often, Keys or Note To Self Mail?

Keys ships an update every 2 weeks, and Note To Self Mail every 6 weeks. Most recently, Keys was updated on October 15, 2026 and Note To Self Mail on October 21, 2026.