Comparison

StoichioAI vs Moshui

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

Head to head
About

StoichioAI

Features
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StoichioAI is for Hong Kong secondary chemistry. Students write calculation steps on a whiteboard. The AI reads the working and asks questions, instead of handing over the answer. It is for students preparing for HKDSE Chemistry and for teachers who need to see how their own groups are doing. The interface, topics and AI replies can be switched between Traditional Chinese and English. English uses Hong Kong DSE chemistry wording and British spelling. Students can: Read an interactive lesson, then try the follow-up calculations Write with Apple Pencil or a finger, or submit a photo from the camera or the photo library Ask for a Socratic hint after a wrong attempt. Spoken feedback is Cantonese in Chinese and English in English Review feedback, past attempts, points, and a learning suggestion based on their own weak spots Teachers can: Create a teaching group and invite students with a join code or a school email See weak topics, common mistakes, and each student’s progress Refresh an AI suggestion for the group or for one student Preview questions and reference answers Topics include reacting masses, concentration, pH, volumetric analysis, standard enthalpy changes, Hess's law, rate of reaction, molar volume of gases, equilibrium constant, shifts in equilibrium, organic synthesis calculations, rate equation, activation energy, atom economy, separation and purification, quantitative analysis, instrumental analysis, and analytical chemistry applications. Sign in with an authorised school email. Points are awarded only the first time an exercise is answered correctly.

About

Moshui

Features
Read full description

An essay marker for HKDSE Chinese Paper 2 and English Paper 2. Snap or paste your essay and get a score, comments and revision advice. Processing time depends on essay length and your connection. BIG PICTURE FIRST • Overall: total score, a one-line verdict, key strengths and the most important thing to improve • Domain scores: Content, Language and Organisation for English; content, expression, structure, punctuation and typos for Chinese • Paragraph by paragraph: what each paragraph does, what works, what to fix, plus a model rewrite • Full text: good sentences, sentences to improve and typos marked in place • Phrase bank: useful phrases and sentences drawn from your essay PAPERS COVERED • English Paper 2: Part A and Part B • Chinese Paper 2: practical writing and composition SNAP TO MARK The document scanner crops automatically and can capture several handwritten pages; you can edit the recognised text before submitting. HOW IT MARKS The reference marking framework combines data and teaching materials. Scores are for writing practice. TRIAL AND FULL VERSION Try 3 reports first. The full version lasts 90 days with up to 10 essays a day. It is a one-off purchase and does not renew automatically. REVISION WITHOUT LOSING YOUR PLACE Jump between report sections with two-level navigation. Open a marked sentence in the editor, keep your revision checkpoint, and compare drafts paragraph by paragraph. IMPORTANT This is an independent study tool, not an official product of the Hong Kong Examinations and Assessment Authority. Scores are for reference only. Privacy Policy: https://www.10minquiz.com/en/privacy-policy Terms of Use: https://www.10minquiz.com/en/terms-of-use

Screenshots

StoichioAI4 screens
Moshui4 screens

Verdict

The call

The clearest difference is in-app purchases: StoichioAI at none against Moshui's 2. Moshui's advantage is update cadence (every 2 days vs weekly) and iOS requirement (15.0 vs 17.1). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Moshui sells 2 one-off in-app purchases. StoichioAI asks for nothing beyond the download.

UpkeepUpdate frequency

StoichioAI ships an update weekly, Moshui every 2 days. The most recent releases landed on October 25, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 3 level
StoichioAI versus Moshui: the parameters behind the verdict, then further details
ParameterStoichioAIMoshui
PriceFreeFree
Update frequencyWeeklyEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.115.0 — better
Further details — not scored
Size27 MB43 MB
Age rating4+4+
DeveloperPang Ka WaiPickmy AI

In-app purchases

None

StoichioAI

No in-app purchases

2 purchases

Moshui

One-time2
  • Full Version 90-Day Pass$19.99
  • 90-day Pro Offer$19.99

Questions

Is StoichioAI free?
StoichioAI is free to download, with no in-app purchases.
Is Moshui free?
Moshui is free to download, with in-app purchases available.
Do StoichioAI or Moshui have ads?
Neither StoichioAI nor Moshui shows ads.
Which is updated more often, StoichioAI or Moshui?
StoichioAI ships an update weekly, and Moshui every 2 days. Most recently, StoichioAI was updated on October 25, 2026 and Moshui on November 6, 2026.

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