Changelog · Socratopia

Theme: Subscription pricing update + math rendering & teaching polish.

Subscription pricing update. Based on early operational feedback, subscription prices have been adjusted to a more accessible tier:
- CNY: ¥149/month, ¥299/quarter, ¥980/year
- USD: $29.99/month, $69.99/quarter, $199/year
- 1.0.5 and earlier clients continue to see the previous prices; new prices apply only to subscriptions newly created on 1.0.6+. Existing subscribers are unaffected within their current billing period.
Smart currency default + confirmation dialog before checkout. The subscription view now auto-selects a default currency based on your network location (CNY by default for mainland-China IPs, USD elsewhere), and pops a confirmation showing the exact amount and currency before bouncing to Stripe — preventing accidental cross-currency payment. You can still manually switch to view either currency.
Refund policy clarified. Terms of Service §3 and the FAQ now include explicit refund terms: refunds may be requested within 7 days of subscription if the service has not been substantively used, or in cases of significant service failure; "tried it and not worth it" post-use refunds are not honored. Full text at socratopia.app.

Multi-line math formulas (\[...\] block syntax across multiple lines) now render correctly. In 1.0.5, when the AI teacher wrote display math in the standard multi-line LaTeX form (with \[ on one line, formula body in the middle, \] on its own line), the renderer didn't recognize it — the backslashes got stripped by markdown processing, producing half-broken literal text like "[ \frac{...}{...} ]". From 1.0.6, multi-line block math renders properly typeset, the same as single-line \[...\]. Fixed across in-class rendering, snapshot exports, and PDF export.
Windows startup resilience: handles stripped PATH environments. A small number of Windows 10 users couldn't launch 1.0.5 because system "optimization" tools had removed the System32 directory from PATH. 1.0.6 adds a 3-tier extraction fallback: absolute path to system tar.exe → absolute path to powershell.exe → pure-JavaScript extraction. The app now starts cleanly even when PATH has been thoroughly cleaned.

The teacher no longer over-expands content the textbook only mentions in passing. Previously, when the textbook briefly mentioned a concept (e.g., a forward reference in a chapter introduction pointing to a later chapter), the AI would expand it into a full teaching block using its training knowledge — disconnecting the lesson from the textbook itself. From 1.0.6, the teacher respects the textbook's own pacing: if a learner asks for depth on an overview-only mention, the teacher transparently notes "the textbook only mentions this here, doesn't expand it" and lets the learner choose — rough sketch in the teacher's own words, advance to the chapter where the textbook actually expands it, or bookmark and continue at the current pace.

Users who want to try the new pricing / multi-currency UX: in-app "Account → Settings → Software Update". New prices apply only to subscriptions newly created on 1.0.6+ — existing subscribers' current periods are unaffected.
Users hitting multi-line math rendering failure on 1.0.5, or Windows clean-install launch failure: please update.
Otherwise-happy 1.0.5 users: no rush — core functionality is fully compatible; update at your convenience.

What's new