# Note Lock ~ Keep your secret vs T5S Viewer

The clearest difference is price: T5S Viewer at Free against Note Lock ~ Keep your secret's $1.99. T5S Viewer also leads on in-app purchases (none vs 10) and iOS requirement (15.6 vs 17.0). Note Lock ~ Keep your secret's advantage is update cadence (every 2 months vs every 55 months). On ads and device support there is nothing between them.

T5S Viewer is free to download; Note Lock ~ Keep your secret costs $1.99 up front. Note Lock ~ Keep your secret sells 10 in-app purchases, starting at $1.99 per month. T5S Viewer asks for nothing beyond the download.

Note Lock ~ Keep your secret ships an update every 2 months, T5S Viewer every 55 months. The most recent releases landed on November 10, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Note Lock ~ Keep your secret | T5S Viewer |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.0 (154 ratings)](https://appshunter.io/ios/app/note-lock-keep-your-secret/id469850764/reviews)** | — |
| Number of ratings | **154** | — |
| Positive reviews | 53.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 55 months |
| Monetization | Free with in-app purchases | — |
| Size | 52 MB | 16 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [i-App Creation Co., Ltd.](https://appshunter.io/developer/360704053) | [SMART VALUE](https://appshunter.io/developer/557447212) |

## What reviewers say

### Note Lock ~ Keep your secret

[App page](https://appshunter.io/ios/app/note-lock-keep-your-secret/id469850764)

Securely store and manage private notes, ideas, and journals with advanced locking mechanisms and privacy features. Organize your thoughts with rich media, customization options, and backup capabilities.

**Highlights:** Folder and pattern lock, Anti-intruder surveillance, Self-destruct data option, Add pictures and stickers, Customizable themes and fonts, Backup and restore data, Calendar and hybrid views

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Note Lock PRO - Monthly | $1.99 | per month |
| Note Lock PRO - Yearly | $9.99 | per year |
| Pro Fonts | $1.99 | one-time |
| Special Fonts | $1.99 | one-time |
| Unique Fonts 1 | $1.99 | one-time |
| Unique Fonts 3 | $1.99 | one-time |
| Cute Fonts | $1.99 | one-time |
| Unique Fonts 2 | $1.99 | one-time |
| Unlock All Fonts | $6.99 | one-time |
| Unlock All In-app | $29.99 | one-time |

**What reviewers like**

- 🔒 Secure storage of private information
- 👍 Easy to use and intuitive interface
- 🚀 Quick access to notes
- 💡 Innovative decoy mode to deter snooping

**What reviewers complain about**

- 🐛 Frequent crashes and freezing issues
- 🔋 Concerns about data loss and lack of backup options
- 👎 Subscription model and loss of functionality in free version
- 🤯 Incompatibility with latest iOS versions

**Reported bugs**

- App crashes when opening notes
- Unable to rotate screen in landscape mode
- Password reset and migration issues when switching devices

**Requested features**

- Search function to easily find notes
- Ability to organize notes into folders
- Syncing and backup options (e.g., iCloud)
- Customization options for fonts, themes, and layouts


### T5S Viewer

[App page](https://appshunter.io/ios/app/t5s-viewer/id1559487251)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Note Lock ~ Keep your secret free?

Note Lock ~ Keep your secret costs $1.99, and also offers in-app purchases.

### Is T5S Viewer free?

T5S Viewer is free to download, with no in-app purchases.

### Do Note Lock ~ Keep your secret or T5S Viewer have ads?

Neither Note Lock ~ Keep your secret nor T5S Viewer shows ads.

### Which is updated more often, Note Lock ~ Keep your secret or T5S Viewer?

Note Lock ~ Keep your secret ships an update every 2 months, and T5S Viewer every 55 months. Most recently, Note Lock ~ Keep your secret was updated on November 10, 2026 and T5S Viewer on November 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*