# Big Button Calculator Pro Lite vs Atlas Time

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.

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.

## The numbers

| Metric | Big Button Calculator Pro Lite | Atlas Time |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.7 (14K ratings)](https://appshunter.io/ios/app/big-button-calculator-pro-lite/id1131056808/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/atlas-time/id6796547372/reviews)** |
| Number of ratings | **14K** | 1 |
| Positive reviews | 82.6% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | **Ad-supported** | Paid |
| Size | 45 MB | 51 MB |
| Requires iOS | **15.2** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cider Software LLC](https://appshunter.io/developer/465180756) | [Howard Patty](https://appshunter.io/developer/6787279319) |

## What reviewers say

### Big Button Calculator Pro Lite

[App page](https://appshunter.io/ios/app/big-button-calculator-pro-lite/id1131056808)

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.

**Highlights:** Large buttons, Dual-line display, 18 color themes, Multi-line input, Gesture controls, VoiceOver accessibility

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 💡 Customizable backgrounds
- 🚀 Accurate calculations
- 👍 Large, clear numbers
- 👍 Helpful for homeschooling

**What reviewers complain about**

- 🐛 Ads can be intrusive
- 🐛 Ads in foreign languages
- 🐛 Ads take time to close
- 🔋 High battery consumption due to ads

**Reported bugs**

- Occasionally shows answer before calculation is complete
- Rounding issues leading to inaccurate results

**Requested features**

- Add more background options
- Allow custom background uploads
- Add option to change button colors
- Improve ad experience or offer ad-free version


### Atlas Time

[App page](https://appshunter.io/ios/app/atlas-time/id6796547372)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Big Button Calculator Pro Lite free?

Big Button Calculator Pro Lite is free to download, with no in-app purchases.

### Is Atlas Time free?

Atlas Time costs $0.99, with no in-app purchases.

### Which has better reviews, Big Button Calculator Pro Lite or Atlas Time?

Atlas Time is rated higher. Big Button Calculator Pro Lite averages 4.7 out of 5 from 14K ratings, while Atlas Time averages 5.0 from 1 ratings.

### Do Big Button Calculator Pro Lite or Atlas Time have ads?

Big Button Calculator Pro Lite shows ads; Atlas Time does not.

### Which is updated more often, Big Button Calculator Pro Lite or Atlas Time?

Big Button Calculator Pro Lite ships an update every 3 months, and Atlas Time fortnightly. Most recently, Big Button Calculator Pro Lite was updated on November 15, 2026 and Atlas Time on November 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*