Jotsuyo vs Synapse Reads
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Jotsuyo
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This application is a search aid using Safari extension. Pre-registered keywords can be easily added to search keywords. Also, advanced searches such as exact match search can be easily performed.
Synapse Reads
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Stop letting your reading disappear. You finish a book, feel changed by it, and three weeks later can't remember a single idea. Synapse fixes that. READING SESSIONS Open any book and start a session. Synapse tracks your reading time while you capture highlights — scan a page, type a quote, or read it aloud and let AI transcribe it instantly. When you finish, see exactly how long you read, what you captured, and whether Synapse found a new connection during that session. FLASH INSIGHTS When two highlights from different books share an unexpected idea, Synapse surfaces it automatically. Powered by Claude, the connections go beyond the obvious — finding threads across books you read years apart that you never would have noticed yourself. THREE WAYS TO CAPTURE Scan physical pages with your camera. Type or paste quotes directly. Or hold the mic and read a passage aloud — Whisper transcribes it and shows you the text to confirm. However you read, capturing a highlight takes seconds. CHAT WITH YOUR LIBRARY Ask your entire collection a question. "What do my books say about focus?" "Find a quote I saved about habits." Every answer comes from your own highlights — not the internet. IMPORT YOUR KINDLE HIGHLIGHTS Upload My Clippings.txt and your entire Kindle library arrives instantly — with covers, metadata, and connection checks running automatically. WHO IS THIS FOR? Non-fiction readers who want their highlights to actually do something. People who finish books and want to remember them. Anyone building a reading habit who wants to see it grow. Download Synapse and make everything you read count.
Screenshots
Verdict
The clearest difference is update cadence: Jotsuyo at every 3 days against Synapse Reads's every 4 weeks. On price, ads, in-app purchases and device support 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Jotsuyo ships an update every 3 days, Synapse Reads every 4 weeks. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.
| Parameter | Jotsuyo | Synapse Reads |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.4 | 15.1 — better |
| Further details — not scored | ||
| Size | 21 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Shuhei Takezawa | Ansh Dave |
In-app purchases
Jotsuyo
No in-app purchases
Synapse Reads
No in-app purchases









