# Big Calculator & Currencies — Low Vision & Autism Friendly > Low Vision & Autism Friendly (iPhone/iPad app by Hassan Hattab.) - Source: https://appshunter.io/ios/app/big-calculator-and-currencies/id6751904594 (this page in markdown: same URL + `.md`) - Developer: [Hassan Hattab](https://appshunter.io/developer/991737639) - Category: Utilities, Finance - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17 · 17 MB - Languages: American English - Released: 2025-09-06 - Data updated: 2026-08-15 - User reviews in markdown: https://appshunter.io/ios/app/big-calculator-and-currencies/id6751904594/reviews.md ## What is Big Calculator & Currencies? Big Calculator is a beautifully designed, fully accessible calculator with built-in currency converter. Built with accessibility at its core, it's perfect for low vision users, neurodivergent individuals, and anyone who wants a clearer, calmer calculating experience. DESIGNED FOR LOW VISION See every number clearly with features built specifically for visual accessibility: Extra-Large Buttons — Massive touch targets that are easy to see and tap Adjustable Font Size — Scale from 50% to 150% based on your needs High Contrast Themes — 8 themes designed for maximum readability Bold, Clear Numbers — Heavy font weights for better visibility Minimal Clutter — Clean interface with no distracting elements Large Currency Flags — Easy-to-identify currency symbols DESIGNED FOR AUTISM & SENSORY SENSITIVITIES We believe everyone deserves tools that work for them. Big Calculator includes thoughtful features for autistic users and those with sensory sensitivities: Accessibility Profiles — One-tap presets for different needs: Low Sensory: Reduced haptics, no sounds, minimal animations High Visibility: Enhanced visual feedback, longer press confirmations Focus: Simplified interface with confirmation dialogs to prevent mistakes Customizable Sensory Controls: Haptic intensity levels (Off, Gentle, Normal, Strong) Optional button sounds Reduce Motion option for minimal animations Visual Feedback You Control: Adjustable button highlight intensity Active field indicators Customizable feedback duration Mistake Prevention: Optional confirmation before clearing Adjustable long-press timing Clear visual indicators of current state POWERFUL CALCULATOR Extra-large buttons for easy tapping Adjustable font sizes (50% to 150%) Clean, distraction-free interface Full calculation history Support for basic operations (+, −, ×, ÷, %) CURRENCY CONVERTER 90+ world currencies Large, easy-to-read currency flags Simple swap between currencies Real-time conversion as you type Remembers your preferred currencies Works seamlessly with the calculator BEAUTIFUL HIGH-CONTRAST THEMES Choose from 8 carefully designed themes optimized for visibility: High Contrast (default) — Yellow on black Black & White — Maximum contrast Blue & Yellow — Color blindness friendly Pure Black & White — Clean and clear Amber on Black — Reduces eye strain Light Mode — Bright and readable Classic iOS — Familiar and comfortable Ocean Blue — Easy on the eyes WHY BIG CALCULATOR? We built Big Calculator because we believe accessibility shouldn't be an afterthought. Whether you have low vision, are neurodivergent, have motor difficulties, or simply prefer larger buttons — this app is designed with you in mind. Every feature can be customized. Every setting can be adjusted. The app works exactly how you need it to work. PRIVACY FIRST No account required No data collection No ads Works completely offline Download Big Calculator today and experience a calculator that truly works for everyone. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Small tip | $0.99 | one-time | | Support The Developer | $4.99 | one-time | | Thank You | $2.99 | one-time | | Big Tip | $9.99 | one-time | ## Version history (last 5 releases) ### 1.5 — 2026-01-06 You can now support the developer. Thank you for your support! ### 1.4 — 2025-12-15 Major Accessibility Update This update introduces comprehensive accessibility features for low vision users and those with sensory sensitivities: FOR LOW VISION USERS Adjustable font sizes (50% - 150%) 8 high-contrast themes Extra-large buttons and touch targets Bold, clear number display Large currency flags for easy identification FOR AUTISM & SENSORY SENSITIVITIES New Accessibility Profiles: Low Sensory — Gentle haptics, no animations, minimal feedback High Visibility — Enhanced visual feedback, stronger haptics Focus — Confirmation dialogs, reduced distractions New Sensory Controls: Haptic intensity: Off, Gentle, Normal, or Strong Reduce Motion toggle Adjustable feedback duration New Confirmation Dialogs: Optional confirmation before clearing calculator Optional confirmation before swapping currencies Prevents accidental mistakes New Timing Controls: Adjustable long-press duration Quick, Normal, Slow, or Very Slow options All features are optional and fully customizable. Enable what helps you, disable what doesn't. ### 1.3 — 2025-11-25 Fixes to the currency conversion rate error ### 1.2 — 2025-11-11 - AC button deletes now one digit at a time. - hold AC to delete all data. ### 1.1 — 2025-09-08 - Ability to tap and switch between the 2 listed currencies . - More themes. - Bug fixes. ## Apps similar to Big Calculator & Currencies | App | Rating | Price | Category | | --- | --- | --- | --- | | [Displayable](https://appshunter.io/ios/app/displayable/id6752018274) | — | Free | Utilities | | [TickDown - timer](https://appshunter.io/ios/app/tickdown-timer/id6751900370) | — | Free | Utilities | | [PDF Locker: PDF Wolf](https://appshunter.io/ios/app/pdf-locker-pdf-wolf/id6745149950) | — | Free | Utilities | | [All in One Calculator - Math](https://appshunter.io/ios/app/all-in-one-calculator-math/id6745767970) | — | $1.99 | Utilities | | [Todo: Tasks & Notes](https://appshunter.io/ios/app/todo-tasks-and-notes/id6751848206) | — | Free | Utilities | | [Meraki Diary](https://appshunter.io/ios/app/meraki-diary/id6743073556) | — | Free | Utilities | ## More apps by Hassan Hattab - [mono Notes for Money](https://appshunter.io/ios/app/mono-notes-for-money/id1089502719) - [Hey Beeps](https://appshunter.io/ios/app/hey-beeps/id1127830982) - [Big Keys Keyboard](https://appshunter.io/ios/app/big-keys-keyboard/id1187555128) - [File Save: Private Vault](https://appshunter.io/ios/app/file-save-private-vault/id6746190100) - [Blind Radar](https://appshunter.io/ios/app/blind-radar/id6746631543) - [Big Bricks - Classic Puzzle](https://appshunter.io/ios/app/big-bricks-classic-puzzle/id6751108137) All apps by Hassan Hattab: https://appshunter.io/developer/991737639 ## Related topics [big calculator low vision](https://appshunter.io/ios/topics/big-calculator-low-vision) · [visual currency calculator](https://appshunter.io/ios/topics/visual-currency-calculator) --- *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 2026-08-15.*