# N3 vs Sacred Knowledge Vault

The clearest difference is monetization model: Sacred Knowledge Vault at free against N3's paid. Sacred Knowledge Vault also leads on update cadence (every 8 days vs every 25 months) and iOS requirement (15 vs 26.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

N3 ships an update every 25 months, Sacred Knowledge Vault every 8 days. The most recent releases landed on October 26, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | N3 | Sacred Knowledge Vault |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 8 days** |
| Monetization | Paid | **Free** |
| Size | 16 MB | 25 MB |
| Requires iOS | 26.0 | **15** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yamase & Touwa Japanese Insititute](https://appshunter.io/developer/442115304) | [平 何](https://appshunter.io/developer/1630512266) |

## What reviewers say

### N3

[App page](https://appshunter.io/ios/app/n3/id493169980)

Master JLPT N3 grammar with over 300 practice questions and detailed explanations. This app covers all required sentence patterns for the N3 reading section, organized for easy understanding. Perfect for on-the-go learning.

**Highlights:** JLPT N3 grammar explanations, Over 300 practice questions, Detailed explanations for each pattern, Covers all N3 reading sentence patterns, One-handed operation, Vocabulary marking and reinforcement

**Features:** Vision Pro support

**In-app purchases:** none


### Sacred Knowledge Vault

[App page](https://appshunter.io/ios/app/sacred-knowledge-vault/id6792727759)

This AI tool offers a unique role-playing system with two knowledge base modes for private or public inquiries. It prioritizes user privacy by storing all conversation data locally and securely. Explore diverse topics with pre-built templates and manage your knowledge with built-in tools.

**Highlights:** Role-playing system with unique identities, Dual knowledge base modes (public & private), Local data storage for maximum privacy, Pre-built prompt templates (Wisdom Sparks), Conversation archiving and favorites, Encrypted API key storage

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

**In-app purchases:** none


## Frequently asked questions

### Is N3 free?

N3 is free to download, with no in-app purchases.

### Is Sacred Knowledge Vault free?

Sacred Knowledge Vault is free to download, with no in-app purchases.

### Do N3 or Sacred Knowledge Vault have ads?

Neither N3 nor Sacred Knowledge Vault shows ads.

### Which is updated more often, N3 or Sacred Knowledge Vault?

N3 ships an update every 25 months, and Sacred Knowledge Vault every 8 days. Most recently, N3 was updated on October 26, 2026 and Sacred Knowledge Vault on October 16, 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.*