# BIG CALCULATOR. vs sanetime

The clearest difference is in-app purchases: sanetime at none against BIG CALCULATOR.'s 1. sanetime also leads on ads (none vs shown) and rating (5.0 vs 4.6). BIG CALCULATOR.'s advantage is ratings volume (70 vs 1) and update cadence (every 3 weeks vs every 2 months). On price, review sentiment, device support and iOS requirement there is nothing between them.

Both are free to download. BIG CALCULATOR. sells 1 in-app purchase, starting at $2.99 per year. sanetime asks for nothing beyond the download.

sanetime holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: BIG CALCULATOR. has 70 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

BIG CALCULATOR. ships an update every 3 weeks, sanetime every 2 months. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | BIG CALCULATOR. | sanetime |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (70 ratings)](https://appshunter.io/ios/app/big-calculator/id1114392920/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sanetime/id6738624346/reviews)** |
| Number of ratings | **70** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 13 MB | 23 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Adysseus](https://appshunter.io/developer/447444997) | [Taogi Limited](https://appshunter.io/developer/1519018420) |

## What reviewers say

### BIG CALCULATOR.

[App page](https://appshunter.io/ios/app/big-calculator/id1114392920)

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.

**Highlights:** Large numbers for easy viewing, Simple and easy-to-see interface, Landscape mode support, Dark UI for eye comfort, Suitable for all ages

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Big Calculator Plus | $2.99 | per year |


### sanetime

[App page](https://appshunter.io/ios/app/sanetime/id6738624346)

This app offers an intuitive way to visualize and manage time zones with a unique rotating clock interface. It simplifies understanding global time differences, helping users avoid scheduling confusion and plan international meetings effortlessly.

**Highlights:** Interactive multi-wheel time zone visualization, Smart 'tomorrow' and 'yesterday' indicators, Haptic feedback for precise time selection, Automatic local time and preference saving, Global city search for any time zone, Light and dark modes, Visual time planning for meetings

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BIG CALCULATOR. free?

BIG CALCULATOR. is free to download, with in-app purchases available.

### Is sanetime free?

sanetime is free to download, with no in-app purchases.

### Which has better reviews, BIG CALCULATOR. or sanetime?

sanetime is rated higher. BIG CALCULATOR. averages 4.6 out of 5 from 70 ratings, while sanetime averages 5.0 from 1 ratings.

### Do BIG CALCULATOR. or sanetime have ads?

BIG CALCULATOR. shows ads; sanetime does not.

### Which is updated more often, BIG CALCULATOR. or sanetime?

BIG CALCULATOR. ships an update every 3 weeks, and sanetime every 2 months. Most recently, BIG CALCULATOR. was updated on November 6, 2026 and sanetime on October 30, 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.*