# CellArc vs SixtySum

The clearest difference is price: SixtySum at Free against CellArc's $1.99. SixtySum also leads on update cadence (every 2 days vs every 10 days) and iOS requirement (15.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

SixtySum is free to download; CellArc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CellArc ships an update every 10 days, SixtySum every 2 days. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | CellArc | SixtySum |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 2 days** |
| Size | 62 MB | 15 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Robert Corbin](https://appshunter.io/developer/1890247992) | [KENTA OSAWA](https://appshunter.io/developer/1896774876) |

## What reviewers say

### CellArc

[App page](https://appshunter.io/ios/app/cellarc/id6771021156)

**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 CellArc free?

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

### Is SixtySum free?

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

### Do CellArc or SixtySum have ads?

Neither CellArc nor SixtySum shows ads.

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

CellArc ships an update every 10 days, and SixtySum every 2 days. Most recently, CellArc was updated on October 8, 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.*