# ABB CLOSER vs RigSync Calendar

The clearest difference is price: ABB CLOSER at Free against RigSync Calendar's $5.99. ABB CLOSER also leads on iOS requirement (12.4 vs 15.1). RigSync Calendar's advantage is update cadence (every 6 days vs every 3 months). On ads, in-app purchases and device support there is nothing between them.

ABB CLOSER is free to download; RigSync Calendar costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ABB CLOSER ships an update every 3 months, RigSync Calendar every 6 days. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ABB CLOSER | RigSync Calendar |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Size | 134 MB | 32 MB |
| Requires iOS | **12.4** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [ABB Information Systems AG](https://appshunter.io/developer/1026885389) | [Joel Marambaia](https://appshunter.io/developer/1876390998) |

## What reviewers say

### ABB CLOSER

[App page](https://appshunter.io/ios/app/abb-closer/id1560948190)

**Features:** macOS Compatibility

**In-app purchases:** none


### RigSync Calendar

[App page](https://appshunter.io/ios/app/rigsync-calendar/id6759013786)

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

**In-app purchases:** none


## Frequently asked questions

### Is ABB CLOSER free?

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

### Is RigSync Calendar free?

RigSync Calendar costs $5.99, with no in-app purchases.

### Do ABB CLOSER or RigSync Calendar have ads?

Neither ABB CLOSER nor RigSync Calendar shows ads.

### Which is updated more often, ABB CLOSER or RigSync Calendar?

ABB CLOSER ships an update every 3 months, and RigSync Calendar every 6 days. Most recently, ABB CLOSER was updated on September 29, 2026 and RigSync Calendar on October 9, 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.*