# Duplicate.So vs Idea Vault

The clearest difference is in-app purchases: Duplicate.So at none against Idea Vault's 2. Idea Vault's advantage is update cadence (every 6 days vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Idea Vault sells 2 in-app purchases, starting at $2.99 per month. Duplicate.So asks for nothing beyond the download.

Duplicate.So ships an update every 2 months, Idea Vault every 6 days. The most recent releases landed on October 5, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Duplicate.So | Idea Vault |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Size | 316 MB | 31 MB |
| Requires iOS | 16.6 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MLM Rebels](https://appshunter.io/developer/1605644342) | [Talha Ashraf](https://appshunter.io/developer/1884352037) |

## What reviewers say

### Duplicate.So

[App page](https://appshunter.io/ios/app/duplicateso/id6449440879)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Idea Vault

[App page](https://appshunter.io/ios/app/idea-vault-ai-notes-app/id6765999984)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Idea Vault Pro Monthly | $2.99 | per month |
| Idea Vault Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is Duplicate.So free?

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

### Is Idea Vault free?

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

### Do Duplicate.So or Idea Vault have ads?

Neither Duplicate.So nor Idea Vault shows ads.

### Which is updated more often, Duplicate.So or Idea Vault?

Duplicate.So ships an update every 2 months, and Idea Vault every 6 days. Most recently, Duplicate.So was updated on October 5, 2026 and Idea Vault on October 8, 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.*