Math Sphere vs VersaMemo

Math Sphere is a smart, user-friendly calculator app that handles everything from everyday basic math to the complex functions you need for school or work. Its clean, simple design makes it easy for anyone, from students to adults, to use intuitively and makes even the toughest calculations feel approachable.

Capture anything. Shape it as you go. VersaMemo is a flexible, feature-rich note app for quick thoughts, to-dos, journals, study, and work—without forcing every idea into the same structure. Keep text, checklists, tables, images, audio, handwriting, and timers together in one note. Add cards, hierarchies, calendars, reminders, and other tools only when you need them. No account required. Your notes stay on your device by default. Start quickly and keep everything together • Open the app and begin writing right away • Rely on automatic saving, Undo and Redo, and interrupted-draft recovery • Mix regular text, headings, formatting, checklists, and tables in one note • Attach images, handwriting, PDFs and other files, and voice memos • Use VersaMemo for shopping lists, daily journals, ideas, study notes, meeting notes, and work records Useful tools inside your notes • Run a timer or stopwatch without leaving the note you are working on • Record elapsed time directly in your text • Add calculations and reusable totals for recurring items • Read long notes aloud with restart, skip, rewind, and speed controls Organize with cards and hierarchies • Browse your notes as a list, flexible cards, or a calendar • Build a clear three-level parent-and-child hierarchy for projects and related information • Use tags, card colors, pinning, and related-note links to find important content quickly • Search your notes and combine filters for tags, colors, schedules, and attachments • Review local statistics for note counts, character counts, writing days, and streaks Connect plans and records with a calendar • See past records, today's notes, and upcoming plans month by month • Add a schedule and local notification to a note • Repeat reminders daily, weekly, monthly, or yearly • Choose which notes may appear in a Home Screen widget Turn images and audio into searchable information • Read text from images and documents with on-device OCR • On supported devices, transcribe voice memos with on-device speech recognition • Search text that you saved from OCR or audio transcription • Download a required language model and translate selected text on your device Make the app feel like yours • Choose light, dark, or system appearance and a theme color • Adjust text size and select an app-wide font • Personalize card colors, memo tints, paper patterns, and wallpapers • Switch between Colorful, Chic, and Basic app icons Useful for • Daily notes, journals, to-do lists, and shopping lists • Class, study, reading, and meeting notes • Work records and hierarchical project organization • Plans, habits, working time, numbers, photos, handwriting, and audio ideas No account required. Local by default. • No VersaMemo account or sign-in is required • Notes and attachments are stored in the app's local storage • Core creation, editing, search, OCR, and read-aloud features work offline • Keep automatic local backup generations and export portable ZIP backups • Optionally protect an exported ZIP with a password • Control access with app lock, memo lock, and Hidden Memos using device authentication • No third-party advertising or first-party behavioral analytics App and memo locks control viewing and actions inside VersaMemo. They do not encrypt the app database, attachments, local backups, or Home Screen widget content. Files exported outside the app are managed by the location or service you choose. VersaMemo Pro The core note-taking experience is free. Eligible Pro features can be tried twice per feature category before purchase. If VersaMemo fits your workflow, unlock Pro with one lifetime in-app purchase. There is no VersaMemo subscription. Some optional features require network access to download fonts or translation models, retrieve link previews, run a selected-text web search, or process an in-app purchase. Core note creation, editing, search, and local backup access remain available without a VersaMemo account.