Big Button Calculator Pro Lite vs Atlas Time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Big Button Calculator Pro Lite
A user-friendly calculator app featuring large buttons and customizable colorful backgrounds. It offers a dual-line display, multi-line input for complex equations, and convenient gesture controls for editing and copying.
- Large buttons
- Dual-line display
- 18 color themes
- Multi-line input
- Gesture controls
- VoiceOver accessibility
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This is THE BEST calculator for iOS with big buttons and colorful backgrounds! This version is ad supported. ・Dual-line display - shows the input and result at the same time ・Percentage and backspace button ・18 color themes ・Multi-line input for really long equations ・Automatic scientific formatting ・VoiceOver accessibility ・Split View Gestures ・Swipe left on the display to backspace ・Swipe right on the display to clear ・Tap & hold on the result to copy ・Tap & hold on the input to move the cursor, copy, paste Customize ・Color Theme ・Sound URL Scheme: bigcalculatorpro://
Atlas Time
Visualize global time zones and daylight patterns with a beautiful world clock. Plan international calls, meetings, or travel by easily comparing local times, dates, and sunrise/sunset information across different cities. The app works offline and requires no account.
- Global time zone comparison
- Daylight and night boundary visualization
- Offline city catalog
- Sunrise and sunset information
- Works on iPhone and iPad
- No internet connection required
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Atlas Time creates a portrait of one shared moment across the globe. Coordinate a global meeting, plan travel, find the right time to call someone abroad, setup your world clock, or simply explore our beautiful blue planet. Swipe through time and watch the boundary between day and night move across Earth. Pinch to zoom and see more detail. Choose any date and time to see how daylight changes throughout the year or see everywhere sunlight reaches right now. Add cities and compare local times, dates, UTC offsets, daylight saving status, and sunrise or sunset information at a glance. Atlas Time includes a curated offline city catalog and is designed for iPhone and iPad, with landscape layouts that make full use of larger screens. The complete app works offline and requires no account or sign-in. One purchase includes everything, zero ads, no subscriptions, no gated content. No internet connection required. Atlas Time includes Earth imagery adapted from NASA Earth Observatory’s Blue Marble Next Generation and Black Marble datasets. NASA does not endorse Atlas Time, and no affiliation is implied.
Screenshots
Verdict
The clearest difference is price: Big Button Calculator Pro Lite at Free against Atlas Time's $0.99. Big Button Calculator Pro Lite also leads on ratings volume (14K vs 1) and iOS requirement (15.2 vs 18.0). Atlas Time's advantage is ads (none vs shown) and update cadence (fortnightly vs every 3 months). On in-app purchases and device support 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 Button Calculator Pro Lite is free to download; Atlas Time costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Atlas Time holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Big Button Calculator Pro Lite has 14K ratings behind it against 1, so its average is the more settled of the two.
Big Button Calculator Pro Lite ships an update every 3 months, Atlas Time fortnightly. The most recent releases landed on November 15, 2026 and November 13, 2026 respectively.
| Parameter | Big Button Calculator Pro Lite | Atlas Time |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.7 (14K ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 82.6% of reviews | — |
| Number of ratings | 14K — better | 1 |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.2 — better | 18.0 |
| Further details — not scored | ||
| Size | 45 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Cider Software LLC | Howard Patty |
Customer experience
Big Button Calculator Pro Lite
Atlas Time
Bugs and requests
Big Button Calculator Pro Lite
Reported bugs
2 issues- Occasionally shows answer before calculation is complete
- Rounding issues leading to inaccurate results
Requested features
4 requests- Add more background options
- Allow custom background uploads
- Add option to change button colors
- Improve ad experience or offer ad-free version
Atlas Time
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Big Button Calculator Pro Lite
No in-app purchases
Atlas Time
No in-app purchases
Questions
Is Big Button Calculator Pro Lite free?
Is Atlas Time free?
Which has better reviews, Big Button Calculator Pro Lite or Atlas Time?
Do Big Button Calculator Pro Lite or Atlas Time have ads?
Which is updated more often, Big Button Calculator Pro Lite or Atlas Time?
Other comparisons
