# A3Calc vs Alt Time

The clearest difference is update cadence: Alt Time at monthly against A3Calc's every 18 months. Alt Time also leads on chart position (#92 vs unranked). A3Calc's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

A3Calc costs $1.99 and Alt Time $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A3Calc ships an update every 18 months, Alt Time monthly. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | A3Calc | Alt Time |
| --- | --- | --- |
| Price | $1.99 | $1.99 |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/alt-time-world-clock-widget/id6754809188/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | — | Paid |
| Best chart rank | — | **#92** |
| Size | 2 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Farren Domenici](https://appshunter.io/developer/583666476) | [MMH Adventures LLC](https://appshunter.io/developer/1850216816) |

## What reviewers say

### A3Calc

[App page](https://appshunter.io/ios/app/a3calc/id1340952531)

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

**In-app purchases:** none


### Alt Time

[App page](https://appshunter.io/ios/app/alt-time-world-clock-widget/id6754809188)

**Currently charting:** #92 Top Paid · Utilities (US App Store)

This app provides lock screen widgets for iPhones, displaying both 12-hour and 24-hour time formats simultaneously. It offers five distinct widget styles and automatically adapts to your system's time settings for a seamless experience.

**Highlights:** Dual 12h/24h time display, Five lock screen widget styles, Automatic system time format detection, Real-time updates, One-tap setup, No data collection or tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is A3Calc free?

A3Calc costs $1.99, with no in-app purchases.

### Is Alt Time free?

Alt Time costs $1.99, with no in-app purchases.

### Do A3Calc or Alt Time have ads?

Neither A3Calc nor Alt Time shows ads.

### Which is updated more often, A3Calc or Alt Time?

A3Calc ships an update every 18 months, and Alt Time monthly. Most recently, A3Calc was updated on October 16, 2026 and Alt Time on October 14, 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.*