# Appbook Viewer vs SPHYNX Vault

The clearest difference is in-app purchases: Appbook Viewer at none against SPHYNX Vault's 8. Appbook Viewer also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.1). SPHYNX Vault's advantage is update cadence (weekly vs every 2 months). On price and device support there is nothing between them.

Both are free to download. SPHYNX Vault sells 8 in-app purchases, starting at $4.99 per month. Appbook Viewer asks for nothing beyond the download.

Appbook Viewer ships an update every 2 months, SPHYNX Vault weekly. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Appbook Viewer | SPHYNX Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sphynx-vault/id6754172921/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 22 MB | 35 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Han Yong Jun](https://appshunter.io/developer/1034271952) | [HarmonizeOps LLC](https://appshunter.io/developer/1846892391) |

## What reviewers say

### Appbook Viewer

[App page](https://appshunter.io/ios/app/appbook-viewer/id1590989191)

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

**In-app purchases:** none


### SPHYNX Vault

[App page](https://appshunter.io/ios/app/sphynx-vault/id6754172921)

Organize, create, and share text templates like AI prompts, emails, and scripts. Securely store your content with cross-platform sync and advanced search. Collaborate with teams using guild-based management and access controls.

**Highlights:** Create and organize text templates, Cross-platform cloud sync, Advanced search and filtering, Guild-based team management, Template fill with customizable fields, Enterprise-grade security

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Guild Bench Monthly | $19.99 | per month |
| Pro Yearly | $49.99 | per year |
| Guild Studio Monthly | $69.99 | per month |
| Guild Fellowship Monthly | $149.99 | per month |
| Guild Bench Annual | $199.99 | per year |
| Guild Sanctum Monthly | $399.99 | per month |
| Guild Studio Annual | $699.99 | per year |


## Frequently asked questions

### Is Appbook Viewer free?

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

### Is SPHYNX Vault free?

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

### Do Appbook Viewer or SPHYNX Vault have ads?

SPHYNX Vault shows ads; Appbook Viewer does not.

### Which is updated more often, Appbook Viewer or SPHYNX Vault?

Appbook Viewer ships an update every 2 months, and SPHYNX Vault weekly. Most recently, Appbook Viewer was updated on October 27, 2026 and SPHYNX Vault on October 22, 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.*