# JikuDeck vs Second Brain Vault

The clearest difference is iOS requirement: JikuDeck at 17.0 against Second Brain Vault's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. JikuDeck sells 1 one-off in-app purchase and Second Brain Vault sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | JikuDeck | Second Brain Vault |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Size | 13 MB | 2 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [QPN Studio LLC](https://appshunter.io/developer/1875452641) | [Byoungho Kim](https://appshunter.io/developer/1888452963) |

## What reviewers say

### JikuDeck

[App page](https://appshunter.io/ios/app/jikudeck/id6758871994)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Unlimited Cards & Styles | $6.99 | one-time |


### Second Brain Vault

[App page](https://appshunter.io/ios/app/second-brain-vault/id6782200821)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Brain Vault (Lifetime) | $17.99 | one-time |


## Frequently asked questions

### Is JikuDeck free?

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

### Is Second Brain Vault free?

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

### Do JikuDeck or Second Brain Vault have ads?

Neither JikuDeck nor Second Brain Vault shows ads.

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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.*