# Back vs SixtySum

The clearest difference is price: SixtySum at Free against Back's $0.99. SixtySum also leads on update cadence (every 2 days vs every 7 months). Back's advantage is iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

SixtySum is free to download; Back costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Back ships an update every 7 months, SixtySum every 2 days. The most recent releases landed on October 23, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Back | SixtySum |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/back-time-calculator/id429892615/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 days** |
| Monetization | Paid | — |
| Size | 4 MB | 15 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Goodman Productions](https://appshunter.io/developer/415454974) | [KENTA OSAWA](https://appshunter.io/developer/1896774876) |

## What reviewers say

### Back

[App page](https://appshunter.io/ios/app/back-time-calculator/id429892615)

This utility app subtracts entered time values from a starting point of 60:00. It allows for easy deletion of individual entries or clearing all values to start fresh. Ideal for quick time calculations.

**Highlights:** Subtracts entered time values, Starts at 60:00, AC button to clear all, Swipe to delete individual entries, Simple user interface

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

**In-app purchases:** none


### SixtySum

[App page](https://appshunter.io/ios/app/sixtysum-time-calculator/id6776988090)

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

**In-app purchases:** none


## Frequently asked questions

### Is Back free?

Back costs $0.99, with no in-app purchases.

### Is SixtySum free?

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

### Do Back or SixtySum have ads?

Neither Back nor SixtySum shows ads.

### Which is updated more often, Back or SixtySum?

Back ships an update every 7 months, and SixtySum every 2 days. Most recently, Back was updated on October 23, 2026 and SixtySum on October 20, 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.*