# TsunDocs vs Omoidase

The clearest difference is in-app purchases: TsunDocs at none against Omoidase's 2. TsunDocs also leads on ads (none vs shown). Omoidase's advantage is update cadence (every 5 days vs every 6 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Omoidase sells 2 in-app purchases, starting at $1.99 per month. TsunDocs asks for nothing beyond the download.

TsunDocs ships an update every 6 months, Omoidase every 5 days. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | TsunDocs | Omoidase |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 8 MB | 5 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Tasuku Tozawa](https://appshunter.io/developer/1537307879) | [Kyogo Hiramatsu](https://appshunter.io/developer/6789476025) |

## What reviewers say

### TsunDocs

[App page](https://appshunter.io/ios/app/tsundocs/id1612923335)

**In-app purchases:** none


### Omoidase

[App page](https://appshunter.io/ios/app/omoidase-ai/id6789476021)

This app helps you find saved articles and videos using AI-generated summaries and tags. It allows for quick saving from various platforms and intelligent search based on vague memories. It also reminds you of content you haven't accessed in a while.

**Highlights:** AI summarization and tagging, Quick save from Safari, YouTube, TikTok, Timestamp saving for YouTube videos, Search by vague keywords, Automatic reminders for unread content, Organized content by source, Save with emotional stamps

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Omoidase Pro（月額） | $1.99 | per month |
| Omoidase Pro（年額） | $9.99 | per year |


## Frequently asked questions

### Is TsunDocs free?

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

### Is Omoidase free?

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

### Do TsunDocs or Omoidase have ads?

Omoidase shows ads; TsunDocs does not.

### Which is updated more often, TsunDocs or Omoidase?

TsunDocs ships an update every 6 months, and Omoidase every 5 days. Most recently, TsunDocs was updated on October 11, 2026 and Omoidase on October 7, 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.*