# Numas Study — Learn and review with AI

> Learn and review with AI (iPhone/iPad app by Matteo Achille Castiglioni.)

- Source: https://appshunter.io/ios/app/numas-study/id6766319208 (this page in markdown: same URL + `.md`)
- Developer: [Matteo Achille Castiglioni](https://appshunter.io/developer/1781510855)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.6 · 10 MB
- Languages: American English, Italian
- Released: 2026-08-28
- Data updated: 2026-09-13
- User reviews in markdown: https://appshunter.io/ios/app/numas-study/id6766319208/reviews.md

## What is Numas Study?

Numas Study is the smart study app for university students and anyone preparing for an exam, a public competition, or a certification. Upload your materials, import your question bank, and organize your revision effectively.
The core features are ready to use, with no setup required.
WHAT YOU CAN DO:
READING AND MATERIAL MANAGEMENT
Upload your PDFs and read them whenever you want. Listen to your materials as audio while you're on the go, with built-in text-to-speech.
QUIZZES FROM YOUR QUESTION BANK
Import your question bank and start practicing right away. Answer checking works directly on your device, with nothing external required.
FOCUSED REVIEW
The app analyzes your quizzes and materials and shows you which topics to focus on, ranked by priority. Tap a topic to jump straight to the material that explains it.
STUDY PLAN
Enter your exam date and organize your study day by day, balancing reading, quizzes, and review.
MOLECULAR STRUCTURES
For scientific materials, the app recognizes molecules and displays them in 2D.
SCIENCE TOOLS
Interactive periodic table with 118 elements and chemistry calculators: concentrations and dilutions, pH of acids and bases, buffer solutions. Open them right where you study — while reading a document, taking a quiz or working in the lab — with contextual help in every tool. All calculations run on-device, no connection needed.
ICLOUD SYNC
Your materials and progress sync automatically across iPhone, iPad, and Mac.
OPTIONAL AI FEATURES
Numas Study can add advanced artificial intelligence features — such as generating summaries, quizzes from your own materials, and oral exam simulations — by connecting your personal key from a supported AI provider. These features are entirely optional: the app is fully usable without them.
PLANS:

Free: 1 course, 5 materials, 5 elaborations per day
Pro: everything unlimited

Start studying more effectively today with Numas Study.
Terms of Use: www.numas.eu/terms-of-use-study
Privacy Policy: www.numas.eu/privacy-study

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Numas Study Pro | $4.99 | per month |
| Numas Study Pro | $34.99 | per year |



## Version history (last 5 releases)

### 1.4 — 2026-09-10

• Grading scales by country: the exam simulation and the oral exam show your grade in the scale you pick under Settings → Exams — out of 30 (Italy), out of 20 (France, Portugal, Belgium), German stepped 1.0–5.0 scale, out of 10 (Spain, Netherlands), Swiss 1–6 scale, percentage with class (UK, Ireland), A–F letter grades (US, Canada) or a plain percentage. On first launch the scale follows your device region; nothing changes for students in Italy.

• Exam format: besides the Italian university format (24 multiple-choice, 2 open questions, 76 minutes, quarter-point penalty) you can choose a short exam (15 multiple-choice, 30 minutes), a midterm (40 multiple-choice, 60 minutes) or a custom format with your own number of questions, open questions, duration and penalty. The start screen and the report show the numbers of the chosen format.

• Oral exam: the virtual professor runs the exam and gives the final grade in the scale you set; the assessment is also recorded in a neutral form, so reports stay comparable if you change scale later.

• Exam simulation reports you already saved keep the scale they were made with.

• New Redox tool (Chemistry): oxidation numbers of a species from a formula with charge (KMnO4, Cr2O7^2-) or from a structure (CH3CH2OH, SMILES) with the rules step by step; reaction analysis — what is oxidised, what is reduced, oxidising and reducing agents, disproportionation — and step-by-step balancing: ion-electron method in acidic or basic medium, oxidation-number method for molecular equations. Every result is checked for atom and charge conservation.

• Standard potentials: under the redox analysis you now see the two recognised half-couples with their E°, E°cell, ΔG° and the spontaneity verdict under standard conditions; plus a new tool, E° potentials, with the table of standard reduction potentials (100+ couples, searchable by formula or name, filterable by medium) where you pick cathode and anode to get E°cell, ΔG° and the overall reaction.

• Organic redox: in the Redox reaction tab you can write organic structures (condensed formulas like CH3CH2OH, or SMILES) next to the inorganic species; balancing works as usual and a new “Atoms that change” section says which carbon is oxidised or reduced and by how many electrons, with the per-atom numbers of reactant and product.

### 1.3 — 2026-08-28

• New "Nomenclature exercises" tool: given the structure (SMILES, formula, functional groups and stereocentres), you write the IUPAC name. Five levels of your choice, from branched alkanes up to rings and stereochemistry. Checking accepts spelling variants and, when you get it wrong, tells you where: parent chain, numbering, suffix, missing substituent, stereo descriptors. The score is per session, with no penalties.

• Condensed formulas: in the organic chemistry tools you can now write CH3CH2OH, (CH3)2CHOH or CH3CH=CH2 instead of SMILES; errors explain where and how to fix them. Exercises, reactions and functional groups show the condensed formula next to the SMILES.

• Functional groups: new "Alkyl substituents" section — methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, isobutyl, tert-butyl and longer chains — with the atom they are attached to. The search analyses what you type (SMILES or condensed formula) right away before asking PubChem; after an online search with no result, just change the text to search again, and names with special characters now reach PubChem correctly.

• Unified review: quizzes and flashcards now share the same spaced-repetition algorithm (SM-2) and the same schedule; a question is rescheduled at most once a day, so repeating the same quiz no longer inflates intervals and reviewing wrong answers no longer wipes your progress. Statistics now count flashcards too and distinguish "learning" questions from those "due today".

• Long documents: topics and glossary are now generated for large documents too; if part of the processing fails due to an AI service error, the work already done is kept and the document shows how many parts are missing. Quizzes generated from your notes draw on the whole document, not just its beginning, and the portions sent to the AI no longer stop mid-word or mid-formula.

• Importing several materials: one final summary says how many are ready and, for the rest, why not; if your key is rejected or the quota runs out, the queue stops and the remaining materials stay in the library to be processed later. Deleting a material now clearly says its questions and review progress go with it.

• Question bank: answers marked in the PDF are looked for before the summary, which now shows real numbers (how many answers were detected and how many are left to the AI). Questions at the end of a page are read with the correct page, so their marked answer is detected too.

• Gemini: the app picks the newest model available to your key on its own (recently created keys no longer accept 2.5 models) and, if a model is withdrawn or the service is overloaded, moves on to the next model by itself (never when the problem is your key or quota). The API key no longer appears in request URLs.

• On first launch the app asks you to read and accept the terms of use (AI-generated content, chemistry tools, API keys, data); the acceptance date is shown in Settings → Legal information.

• IUPAC name: the molecule's common name is shown even when a systematic name is not available; benzene no longer opens an empty steps panel.

• Calculators: when you change the acid-base pair in the buffer or the formula in concentrations, the manual value restarts from the new one instead of keeping the old one. [H⁺] concentrations and Ka/Kb constants no longer show "10·10⁻¹⁴" at the edges of the scale.

• Organic reactions and product prediction: after an AI error you can retry without retyping the reagents.

• SMILES: accidentally pasted line breaks are ignored, and invalid characters are reported precisely, including inside square brackets.

• Periodic table: the crystal structure is now translated into English.

• Various fixes and stability improvements.

### 1.2 — 2026-07-31

• Up to 150 questions generated from your notes. Generation now works through successive sections, so it no longer stops after the first few dozen, and it shows progress as it goes.

• The number of questions offered reflects the material you actually have, so the app no longer promises more than it can deliver.

• New AI chat where the context is rich: under a question generated from your notes, while reading a document, and in Lab sessions. Ask for clarifications on the material you are studying. Requires a configured API key and is included in the Pro plan.

• Smarter search: searching "ammino acidi" also finds "amminoacidi", and results containing the exact phrase come first.

• Correct molecular structures: some molecules were shown with another compound's structure.

• Reworked concept maps: all branches are visible, zoom and panning behave correctly, and the shared image keeps the links between concepts.

• Question-bank entries that were unreadable on import stay out of quizzes, and you can now restore them whenever you want.

• Various fixes and stability improvements.

### 1.1.1 — 2026-07-14

What's New in 1.1.1
In case you missed the recently added Tools:
• Interactive periodic table: 118 elements with chemical, physical and structural properties, zoom and detail cards
• Concentration calculator: molarity and dilutions, with molar mass from the chemical formula
• pH calculator: strong and weak acids and bases, comparing the exact method with the teaching approximation
• Buffer solutions: Henderson-Hasselbalch equation with validity warnings
• Access them while studying from documents, quizzes and lab, with contextual help
Improvements in this version:
• More reliable search within course materials
• Question-bank quizzes cleaned of incomplete items
• Full-screen document view from the study plan
• More stable quiz generation

### 1.1.0 — 2026-07-12

What's New in 1.1.0 — Introducing Tools
• Interactive periodic table: 118 elements with chemical, physical and structural properties, zoom and detail cards
• Concentration calculator: molarity and dilutions, with molar mass computed from the chemical formula
• pH calculator: strong and weak acids and bases, comparing the exact method with the textbook approximation
• Buffer solutions: Henderson-Hasselbalch equation with validity warnings
• Tools always at hand: open them right where you study — from documents, quizzes and lab sessions, with contextual help in every tool

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## More apps by Matteo Achille Castiglioni

- [NumasMakerPro](https://appshunter.io/ios/app/numasmakerpro/id6797303979)

All apps by Matteo Achille Castiglioni: https://appshunter.io/developer/1781510855

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-13.*