BIG CALCULATOR. vs Calculator Lock
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
Calculator Lock
Securely hide your private photos, videos, contacts, and passwords behind a disguised calculator interface. Protect your sensitive files with a secret vault and access them only through the app's unique interface. Features include intruder selfies and cloud backups.
- Photo hiding
- Video hiding
- Contact hiding
- Password manager
- Disguise mode
- Intruder selfie
- Cloud backup
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Calculator Lock is photo hiding app where you can hide Photo, video lock, under Secret Vault protected by hidden calculator Lock app. This Secret photo vault calculator video vault is just work as photo lock and video locker where you can lock your files like, gallery Vault. Vault app can get photo album, gallery or file manager private photos, videos, movies and you can play hidden videos inside Calculator Vault. It has a Built-in Photo Viewer to view lock photo. It is Easy to Manage, Delete, Unhide, hide Pictures in gallery vault. It also provides you with other useful functions, including Vault app, video locker, Secure vault, Hide Photo etc. ●● Secret calculator vault Key Features ●● ===================================== ● Photo hide Photo lock will be stored data in hidden photo vault calculator to access by photo lock app. Hide Photo will not be shown in any other vault app, photo album, gallery vault or file manager. You can play or view all your locked photos inside a safe calculator app with an amazing Inbuilt Image viewer. ● Hide Video Inside Video vault you can play lock video by Secure vault with inbuild video player. when you hide my photo keep others away from your private video lock. You can hide video inside Secret Calculator safe. The calculator app hider provides you to lock video and play that video lock inside the app. ● Hidden calculator vault app The calculator vault app provides you so many new futures besides photo lock and video lock. Inside safe Calculator app hider you can create new contact and hide contact. ● Lock files in secret gallery Photo hiding app you can create & share your Personal Notes, hide Contact, hide pics within secret calculator app without exporting it. You can access it inside the calculator app hider ● My Password Manager My Password Manager is unique future for HidePass where you can Hide Password and store all password with protected files, and can only be see inside hidden gallery lock. Secure Vault has password lock in encrypted formats with Secret calculator app. ● Restore media in private photo vault You can Restore all of your data from secret photo vault, once you open app to hide pictures inside hidden gallery lock, you can anytime export secret gallery lock data within Secret Calculator and it will move from Secret vault to your phone. ● Disguise Mode in Spy calculator Lock Calculator Lock has Disguise Mode feature that enables users to change the app's icon or logo to something less conspicuous, providing an extra layer of privacy and security. ● Intruder selfie in Photo Lock App Snap Intruder Capture selfie photos of Intruder when someone tries to break in your Secret vault with wrong passwords. ● iCloud Backup and Google Drive Backup Securely back up your data using Google Drive or iCloud backup options. This feature ensures that your data safely stored and can be restored whenever needed. ● App Migration Easily migrate your data from an old device to a new one it allows seamless transfer of all your data ensuring you don't lose any data during the transition. -----------FAQ----------- Q: How to open? A: Enter your password on hidden calculator photo vault and press '=' button to open. Q: What if I forget my password? A: You can enter “11223344=” for master reset your password by verifying your security question and reset the password. => IMPORTANT - Calculator Lock - Photo Lock & safe Calculator Vault app does not copy or store your Photos, Videos, Audio, Contacts, Notes, Passwords, etc. - Do not uninstall Calculator Vault - Secure Vault app otherwise, all your files will be lost forever. Here is EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://calculatorlock.macymind.com/privacy-policy-calculator-lock.php
Screenshots
Verdict
BIG CALCULATOR. and Calculator Lock both sit at 4.6 stars, but that hides the real split: 100% of BIG CALCULATOR.'s written reviews are positive against 75% of Calculator Lock's. BIG CALCULATOR. also leads on monetization model (ad-supported vs free with in-app purchases). Calculator Lock's advantage is ratings volume (6.6K vs 65) and iOS requirement (13.0 vs 15.0). On price, rating, update cadence and ads 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
Both are free to download. BIG CALCULATOR. sells 1 in-app purchase, starting at $2.99 per year and Calculator Lock sells 7 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.6 for BIG CALCULATOR. against 4.6 for Calculator Lock. That said, the two scores are not equally well evidenced: Calculator Lock has 6.6K ratings behind it against 65, so its average is the more settled of the two. Written reviews are what separate them: 100% of BIG CALCULATOR.'s written reviews are positive against 75% of Calculator Lock's.
BIG CALCULATOR. ships an update every 3 weeks, Calculator Lock every 2 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | BIG CALCULATOR. | Calculator Lock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (65 ratings) | 4.6 (6.6K ratings) — better |
| Positive reviews | 100.0% of reviews — better | 74.8% of reviews |
| Number of ratings | 65 | 6.6K — better |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 80 MB |
| Age rating | 4+ | 17+ |
| Developer | Adysseus | ZipoApps |
Customer experience
BIG CALCULATOR.
Calculator Lock
Bugs and requests
BIG CALCULATOR.
Not enough reviews yet to summarise bugs or requests.
Calculator Lock
Reported bugs
4 issues- Doesn't save downloaded videos to gallery
- Can't paste information in notes
- Intruder selfie feature not working
- App icon change not working
Requested features
3 requests- Ability to change app name
- Sync between devices
- Ability to paste information in notes
In-app purchases
BIG CALCULATOR.
- Big Calculator Plus$2.991 Year
Calculator Lock
- Calculator Lock Pro Weekly$1.997 Days
- Hide Photos & Videos3 Days trial$4.991 Month
- Calculator Lock Pro Yearly$14.991 Year
- Remove Ads$3.99
- Calculator Lock (Remove Ads)$3.99
- Calculator Lock Pro (Discount)$14.99
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- Calculator Lock Pro (Lifetime)$29.99
Questions
Is BIG CALCULATOR. free?
Is Calculator Lock free?
Which has better reviews, BIG CALCULATOR. or Calculator Lock?
Do BIG CALCULATOR. or Calculator Lock have ads?
Which is updated more often, BIG CALCULATOR. or Calculator Lock?
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