# TimeSpanCalc vs OneFocus

The clearest difference is in-app purchases: TimeSpanCalc at none against OneFocus's 1. TimeSpanCalc also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. OneFocus sells 1 one-off in-app purchase. TimeSpanCalc asks for nothing beyond the download.

TimeSpanCalc ships an update every 3 weeks, OneFocus every 2 months. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | TimeSpanCalc | OneFocus |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Paid | — |
| Size | 1 MB | 33 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Masahiko Nogami](https://appshunter.io/developer/806726009) | [Freedom Dimension (shenzhen) Technology Co., Ltd](https://appshunter.io/developer/6776064465) |

## What reviewers say

### TimeSpanCalc

[App page](https://appshunter.io/ios/app/timespancalc/id806726006)

Calculate time durations between dates or specific hours. This tool helps determine the span of time by inputting start and end dates or hours. It's optimized for multitasking on iPads.

**Highlights:** Calculate start date, Calculate end date, Calculate hours, Calculate days, iPad multitasking support

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

**In-app purchases:** none


### OneFocus

[App page](https://appshunter.io/ios/app/onefocus-deep-work/id6790143964)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OneFocus Pro Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is TimeSpanCalc free?

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

### Is OneFocus free?

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

### Do TimeSpanCalc or OneFocus have ads?

Neither TimeSpanCalc nor OneFocus shows ads.

### Which is updated more often, TimeSpanCalc or OneFocus?

TimeSpanCalc ships an update every 3 weeks, and OneFocus every 2 months. Most recently, TimeSpanCalc was updated on November 1, 2026 and OneFocus on November 8, 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.*