BIG CALCULATOR. vs TapReader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BIG CALCULATOR.
This utility app offers a straightforward and visually clear calculator experience, ideal for users of all ages. Its large numbers and dark interface enhance readability, while landscape mode support on iPhones and iPads provides added convenience.
- Large numbers for easy viewing
- Simple and easy-to-see interface
- Landscape mode support
- Dark UI for eye comfort
- Suitable for all ages
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A calculator you can actually see — and now hear. Big Calculator does four things — add, subtract, multiply and divide — with keys and digits large enough to read and to hit first time. Nothing else is on the screen. It was built for people who find the calculator that came with their phone too small: for cataracts, glaucoma and macular degeneration, and for anyone whose eyes are simply not what they were. BIG WHERE IT COUNTS • Keys that fill the screen, with room between them • A readout in large, heavy type — no thin, faint numbers • Hide the memory keys and every remaining button grows • Long sums stay readable, grouped the way your country writes them • Portrait or landscape, on iPhone and iPad IT READS THE ANSWER OUT LOUD Turn on VoiceOver and Big Calculator speaks each result the moment it is worked out, so you never have to hunt across the screen for the answer. • Every key says what it is — "Add", "Equals", "Memory add" — not "plus sign" • Divide by zero and it says so, in words • Switch the speaking off in Settings if you would rather it stayed quiet Most calculators leave a blind user to explore the screen and guess. This one tells you. THREE LOOKS — PICK WHAT SUITS YOUR EYES • Warm Paper — dark type on a bright, warm background. Easiest to read for most people. • Night — white on black at high contrast, for eyes that find bright screens painful. • Classic — the original look, with bolder type. The whole app repaints the moment you choose, so you see the difference before you commit. A DESK CALCULATOR ON YOUR PHONE • M+, M− and MRC memory keys, where you expect them • AC clears everything, C clears just the entry • A key press you can hear — or silence it in Settings IN YOUR LANGUAGE, WITH YOUR NUMBERS Available in 23 languages. The decimal point and the thousands separator follow your own country's convention, so the number on screen is written the way you write it — 1,234.56 or 1.234,56 or 1 234,56, whichever is yours. NOTHING ELSE No account. No sign-in. No cloud. Nothing to learn. Your sums stay on your phone. Big Calculator is free, supported by a single banner advert at the bottom of the screen. SUBSCRIPTION Big Calculator Plus — an optional auto-renewing subscription, one year in length. No ads, plus a bigger keypad and display with more room for your calculations. Payment is charged to your Apple Account when you confirm the purchase. It renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings. The price is shown before you confirm. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://developer-yl.github.io/big-calculator/privacy.html
TapReader
Instantly convert printed text into spoken words with this offline application. Simply scan documents or signs, and the app will read them aloud in a natural voice. It's designed for speed, privacy, and accessibility, requiring no internet connection or account setup.
- Scan and listen to printed text
- 100% offline functionality
- No subscription or login required
- Supports multiple languages
- Reads handwriting
- Accessible design for vision impairment
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TAPREADER Scan and listen — 100% offline. No subscription. No login. Just $1.99 — forever. TapReader is designed for anyone who needs a fast, private way to read printed text. Whether you’re on the go, in a hurry, or prefer to listen, TapReader makes reading easier for everyone. It’s especially beneficial for users with vision impairments, but it's just as perfect for anyone looking for a simple, effective solution for reading text quickly and easily. How it works: Select a language, tap Scan to capture text, then tap Read to hear it aloud — it's that easy. For better results, use Ava(enhanced) voice. To download it, go to your device's 'settings' - 'Accessibility' - 'Spoken Content' - 'Voices' - 'English' - 'Voice', find and download Ava Enhanced voice. 100% offline — no Wi-Fi or mobile data required Accessible design — easy for users with vision issues No setup or account needed — just open and use No image upload or personal data collection Natural-sounding English voice, plus 9 major languages: English, Simplified Chinese, Traditional Chinese, Japanese, Korean, Spanish, French, German, Portuguese, Russian Accurate and fast text recognition: it reads handwriting too Can be used anytime, anywhere Zoom in to scan and read from distance: shop signs, street names, plate numbers etc. DISCLAIMER: TapReader is not a medical device. It helps users read printed text and does not provide medical advice or treatment.
Screenshots
Verdict
The clearest difference is review sentiment: BIG CALCULATOR. at 100% against TapReader's 50%. BIG CALCULATOR. also leads on price (Free vs $1.99) and rating (4.6 vs 1.0). TapReader's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement 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
BIG CALCULATOR. is free to download; TapReader costs $1.99 up front. BIG CALCULATOR. sells 1 in-app purchase, starting at $2.99 per year. TapReader asks for nothing beyond the download.
BIG CALCULATOR. holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: BIG CALCULATOR. has 65 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of BIG CALCULATOR.'s written reviews are positive against 50% of TapReader's.
| Parameter | BIG CALCULATOR. | TapReader |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.6 (65 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 65 — better | 1 |
| Update frequency | Every 3 weeks | — |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15 |
| Further details — not scored | ||
| Size | 13 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Adysseus | Xiaozhi Xing |
Customer experience
BIG CALCULATOR.
TapReader
In-app purchases
BIG CALCULATOR.
- Big Calculator Plus$2.991 Year
TapReader
No in-app purchases









