Comparison

ThoughtDB vs Double memo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

ThoughtDB

Organize Your Thoughts

About

ThoughtDB

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

Read full description

Quickly organize your thoughts into an easy to navigate database. Sort thoughts into subjects and tags to group your ideas together.

About

Double memo

Features

Read full description

Memo that displays and edits two memos side by side

Screenshots

ThoughtDB3 screens

Double memo4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 6 level

ThoughtDB versus Double memo: the parameters behind the verdict, then further details
Parameter	ThoughtDB	Double memo
Price	Free	Free
Positive reviews	0.0% of reviews	—
Update frequency	Every 2 months	Every 2 weeks — better
Ads	No — better	Yes
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.4 — better	15.8.3
Further details — not scored
Size	3 MB	37 MB
Age rating	4+	4+
Developer	Nitch Ventures LLC	Hideaki Uchikoshi

In-app purchases

None

ThoughtDB

No in-app purchases

None

Double memo

No in-app purchases

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.