# Tungsten Power PDF Mobile vs RigSync Calendar

The clearest difference is price: Tungsten Power PDF Mobile at Free against RigSync Calendar's $5.99. RigSync Calendar's advantage is update cadence (every 6 days vs every 20 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

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

Tungsten Power PDF Mobile ships an update every 20 months, RigSync Calendar every 6 days. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Tungsten Power PDF Mobile | RigSync Calendar |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[3.6 (8 ratings)](https://appshunter.io/ios/app/tungsten-power-pdf-mobile/id1599500192/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 6 days** |
| Monetization | Free | — |
| Size | 41 MB | 32 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | +4 |
| Developer | [Tungsten Automation Corporation](https://appshunter.io/developer/524825572) | [Joel Marambaia](https://appshunter.io/developer/1876390998) |

## What reviewers say

### Tungsten Power PDF Mobile

[App page](https://appshunter.io/ios/app/tungsten-power-pdf-mobile/id1599500192)

This application offers robust PDF viewing and editing capabilities on mobile devices. It allows for annotation, form filling, signature creation, and document management, with cloud integration for easy sharing.

**Highlights:** Fast PDF opening, Annotation and markup tools, Form filling, Digital signature creation, Cloud document sharing, Document management

**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 Tungsten Power PDF Mobile free?

Tungsten Power PDF Mobile is free to download, with no in-app purchases.

### Is RigSync Calendar free?

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

### Do Tungsten Power PDF Mobile or RigSync Calendar have ads?

Neither Tungsten Power PDF Mobile nor RigSync Calendar shows ads.

### Which is updated more often, Tungsten Power PDF Mobile or RigSync Calendar?

Tungsten Power PDF Mobile ships an update every 20 months, and RigSync Calendar every 6 days. Most recently, Tungsten Power PDF Mobile was updated on November 3, 2026 and RigSync Calendar on November 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.*