# ThoughtDB vs Double memo

The clearest difference is ads: ThoughtDB at none against Double memo's shown. Double memo's advantage is update cadence (every 2 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

ThoughtDB ships an update every 2 months, Double memo every 2 weeks. The most recent releases landed on October 17, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ThoughtDB | Double memo |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 3 MB | 37 MB |
| Requires iOS | **15.4** | 15.8.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitch Ventures LLC](https://appshunter.io/developer/1094164421) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### ThoughtDB

[App page](https://appshunter.io/ios/app/thoughtdb/id1619039005)

This app helps you organize your thoughts into a navigable database. You can sort ideas by subjects and tags to group them effectively.

**Highlights:** Organize thoughts into a database, Navigate thoughts easily, Sort thoughts by subject, Group ideas with tags

**Features:** Vision Pro support

**In-app purchases:** none


### Double memo

[App page](https://appshunter.io/ios/app/double-memo/id6502283245)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ThoughtDB free?

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

### Is Double memo free?

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

### Do ThoughtDB or Double memo have ads?

Double memo shows ads; ThoughtDB does not.

### Which is updated more often, ThoughtDB or Double memo?

ThoughtDB ships an update every 2 months, and Double memo every 2 weeks. Most recently, ThoughtDB was updated on October 17, 2026 and Double memo on October 25, 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.*