HLL Pdf Reader vs Key memos
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HLL Pdf Reader
This app offers a streamlined PDF reading experience with an iBooks-inspired interface. It provides features like recent reading history, page cropping for larger content views, and an outline for easy navigation. Zooming is simplified with double-tap gestures.
- iBooks-like design
- Reading history
- Page cropping
- Document outline
- Double-tap zoom
- Automatic fit on rotation
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Universal app - Support for iPhone / iPad iBooks-like design - Support your reading experience with simple User Interface. Recently read books - Show your reading histories. Therefore you can find books that you read recently. Cropping - Crop page merging to show contents bigger automatically. Outline - Show current document structure so that you can see your position and move around easily. No more pinch in/out. - Zoom in/out with double tap. - Fit document to device size automatically when rotating.
Key memos
This app helps you store hints for your passwords and login information for various online services. It allows for organized storage in folders and offers optional PIN code protection and iCloud synchronization.
- Store password hints and login details
- Organize with folders
- Optional PIN code protection
- iCloud synchronization
- Hide cards and folders
- Export and restore data
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This app is for those who still remember their passwords, but there are so many of them that sometimes you need hints to remember. And for those who keep their passwords in Notes, then this app will definitely be the best place to store them. There are no subscriptions or in-app purchases. IT IS IMPORTANT TO REMEMBER: The information inside is NOT encrypted. Write down only the hints that you understand here! CARDS The application stores cards with password hints and other information for logging into various online services. In each card, you can write: - name, - a note, - url or website address, - login or login prompt, - password hint opportunities: + Create new folders without restrictions + Add cards to folders without restrictions + The ability to use without a PIN code + You can still add a PIN code and expand the functionality of the application. + Synchronization via iCloud - Your data will not be lost when you change your device (you can disable this in the settings) + You can hide both folders with cards and each card separately from prying eyes. + If you do not use iCloud, it is possible to output all the application data in a separate file, save it and then restore this data from the file. This file is not readable by normal means.
Screenshots
Verdict
The clearest difference is price: HLL Pdf Reader at Free against Key memos's $0.99. HLL Pdf Reader also leads on iOS requirement (15.0 vs 17.0). On rating, ratings volume, update cadence and ads 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
HLL Pdf Reader is free to download; Key memos costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for HLL Pdf Reader against 5.0 for Key memos. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
HLL Pdf Reader ships an update every 9 months, Key memos every 6 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | HLL Pdf Reader | Key memos |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 9 months | Every 6 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 15 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | hades lade lam | Evgeny Turchaninov |
Customer experience
HLL Pdf Reader
Key memos
In-app purchases
HLL Pdf Reader
No in-app purchases
Key memos
No in-app purchases









