PDF Secure vs OneCrypt
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Secure
Secure your PDF documents by adding password protection, ensuring they cannot be opened without authorization. You can also easily remove existing password protection from your files. This app offers a straightforward process for safeguarding your sensitive information.
- Password protect PDF documents
- Remove PDF password protection
- Cross-platform compatibility
- Export to various locations
- Dark mode support
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Protect your PDF documents with a password. The PDF won't open without the password. It works on any platform. PDF Secure also allows you to completely remove the password protection of a document. Using PDF Secure is very simple: • Select a PDF document from your files • Choose a password (ideally strong) and do not forget it • Export anywhere (Files app, any cloud drive, E-mail, AirDrop, Messages, ...) → The password will now be requested at any attempt to open the PDF (on all platforms) PDF Secure is compatible with the dark mode. And it's 100% free (no in-app purchases, no ads). NO DATA COLLECTION. Everything happens on device. Your privacy matters. Enjoy!
OneCrypt
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OneCrypt is your privacy protection partner, helping you easily encrypt and protect your files and sensitive text information. Whether it's your personal photos, important documents, or private notes, OneCrypt provides the highest level of security to ensure that your data is not accessed without authorization. Main Features: Powerful AES encryption technology: Using advanced AES encryption algorithm to ensure that your files and text information are difficult to be cracked. File and text encryption: Encrypt your photos, files, and private text information to ensure that only you can access and decrypt them. Disappearing content: When encrypting photos and videos, you can choose the disappearing mode. After the receiver views it, they cannot view it again, and cannot take screenshots. Set valid time: When encrypting photos and videos, you can set a valid time. Files that exceed the valid time will not be able to be viewed. Privacy Space: Encrypt photos with a secret key and upload them to cloud storage. Memo: Used to save personal account passwords, card information, etc., encrypted and can be uploaded to cloud storage space Fast and simple: One-click encryption makes privacy protection simpler and faster. Multi-language support: Supports multiple languages to meet the needs of global users. Whether it's for personal use or commercial scenarios, OneCrypt is your most reliable privacy protection partner. Download and use AES encryption master to keep your data always secure and reliable, away from the risk of leakage. Protect your privacy, start with OneCrypt! Note: To use OneCrypt, you need to set up and manage your encryption keys. Please keep your keys properly to ensure that only you can access and decrypt encrypted content. Download OneCrypt and make privacy protection simpler, safer! --------------------------------------- 【Monthly Pro Description】 -- Subscription Period: 1 month -- Subscription Price: ¥3.00 per month 【Annual Pro Description】 -- Subscription Period: 1 year -- Subscription Price: ¥38.00 per year 【Lifetime Pro Description】 -- Valid Period: Lifetime -- Payment Price: ¥58.00 【Other Rules】 -- Payment: Deducted from user's iTunes account, payment is made upon user's confirmation -- Renewal: Apple iTunes account will be charged within 24 hours before expiration, and subscription period will be extended by one cycle after successful deduction -- Cancel Renewal: To cancel renewal, please perform the operation at least 24 hours before the current charging cycle. Operation method: Go to [Settings] from the Home page -> Click [iTunes Store and App Store] -> Click [Apple ID], select [View Apple ID] -> [Account Settings] -> Click [Subscriptions], and select Monthly Pro or Annual Pro to cancel. Lifetime Pro cannot be canceled. --------------------------------------- --User Agreement: [https://mn7tedo0hi.feishu.cn/docx/K7sRdeYQvoPBzPxF3gNc3wXPnkh] --Privacy Policy: [https://mn7tedo0hi.feishu.cn/docx/Nc7UdxCkSok51cxyU3lcyUQRnGf]
Screenshots
Verdict
The clearest difference is in-app purchases: PDF Secure at none against OneCrypt's 3. PDF Secure also leads on ads (none vs shown). OneCrypt's advantage is update cadence (every 9 days vs every 9 months). On price, device support and iOS requirement 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
Both are free to download. OneCrypt sells 3 in-app purchases, starting at $0.99 per year. PDF Secure asks for nothing beyond the download.
PDF Secure ships an update every 9 months, OneCrypt every 9 days. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.
| Parameter | PDF Secure | OneCrypt |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (376 ratings) — better | — |
| Positive reviews | 98.8% of reviews | — |
| Number of ratings | 376 — better | — |
| Update frequency | Every 9 months | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 1 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | iSolid apps | 国材 苏 |
In-app purchases
PDF Secure
No in-app purchases
OneCrypt
- Annual Pro7 Days trial$0.991 Year
- Monthly Pro$0.991 Month
- Lifetime Pro$2.99
Questions
Is PDF Secure free?
Is OneCrypt free?
Do PDF Secure or OneCrypt have ads?
Which is updated more often, PDF Secure or OneCrypt?
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