Free Knowledge recall - Top Rated AI Tools

LongTerMemory - AI study tool

Study smarter with AI-powered active recall and spaced repetition.

Studying

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Af

🙏 1 karma

Jul 19, 2026

@LongTerMemory - AI study tool

I tried it. Very useful to convert my materials and images to Q&A pairs (like flashcards). I will try the scheduled study plan.

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Released 3d ago

Free + from $7

152

10

5.0

HydraDB

The fastest GraphDB built on object storage

Databases

Open

319 hydradb.com

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🇺🇸 United States

Released 21d ago

Free + from $25/mo

728

5

5.0

Memorae

Productivity and memory made simple with Whatsapp Agentive AI

Productivity

Open

18,703 memorae.ai

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Released 11mo ago

Free + from $3.99/mo

22,040

50

5.0

Kognitium

Unlock knowledge with AI-powered information discovery.

Knowledge exploration

Open

Solid platform. Cites information, provides follow-up queries. FREE

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Released 2y ago

Free + from $12.5/mo

2,171

56

5.0

BookRecall

Books change your life. Only if you remember them.

Book analysis

Open

319 bookrecall.app

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🇸🇮 Slovenia

Released 13d ago

100% Free

694

7

5.0

Nugget

Duolingo for personal growth with 1400+ concepts from non fiction books.

Personal development

Open

830 nugget.coach

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Released 4d ago

Free + from $9.99/mo

1,236

9

5.0

Cramd

AI-powered study platform that personalizes learning.

Learning

Open

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Released 1y ago

Free + from $6.99/mo

1,132

14

5.0

Octopoda

Persistent memory infrastructure for AI agents with Real Time Analytics

AI memory

Open

8,549 www.octopodas.com

Brilliant system and feels fairly easy to use, one issue with sign in took me 5 mins, but i think its fixed now? Not perfect, but a step in the correct direction!

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Released 3mo ago

100% Free

9,886

27

4.8

Flashback

Turn course material into AI-powered study sessions.

Studying

Open

24,079 flashbackstudy.com

Shewag Ferk

Mar 27, 2026

@Flashback

okay so the timing on when it makes you review is kinda creepy accurate? like it'll pop up right when i'm about to forget something. been using it for bio and actually remembering lecture stuff past the exam for once.

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Released 1y ago

Free + from $9/mo

35,670

128

4.0

Keepmind

Keepmind: flashcards, quizzes, and mindmaps to boost memory.

Flashcards

Open

8,650 keepmind.ai

Keepmind can quickly turn study materials or notes into flashcards, quizzes, and mind maps, while using the more efficient FSRS-5 algorithm to boost learning efficiency — super practical!

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Released 11mo ago

Free + from $10/mo

10,907

28

4.0

Opal

AI-powered study tool for faster learning and better recall

Learning

Open

Great for small assignments and trying to parse through a large document. Got a subscription last month, pretty cheap which is a good benefit, totally worth the cost.

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Released 1y ago

Free + from $5/mo

3,152

58

4.0