# Workover Assistant vs TallyRig

The clearest difference is rating: Workover Assistant at 5.0 against TallyRig's 4.0. Workover Assistant also leads on in-app purchases (none vs 1). TallyRig's advantage is update cadence (every 3 months vs every 58 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. TallyRig sells 1 one-off in-app purchase. Workover Assistant asks for nothing beyond the download.

Workover Assistant holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Workover Assistant ships an update every 58 months, TallyRig every 3 months. The most recent releases landed on October 20, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Workover Assistant | TallyRig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/workover-assistant/id1117692519/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/tallyrig-well-control-calc/id6758645641/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 58 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 3 MB | 33 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [嘉炜 丰](https://appshunter.io/developer/1759511819) |

## What reviewers say

### Workover Assistant

[App page](https://appshunter.io/ios/app/workover-assistant/id1117692519)

This utility app assists oil and gas field personnel with essential calculations for well workovers. It provides tools for hydrostatic pressure, internal capacity, and other critical functions, serving as a convenient resource for rig site or office use.

**Highlights:** Hydrostatic pressure calculations, Internal capacity calculations, Oil and gas well workover tools, Rig site and office utility, Accurate field calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### TallyRig

[App page](https://appshunter.io/ios/app/tallyrig-well-control-calc/id6758645641)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TallyRig Pro | $14.99 | one-time |


## Frequently asked questions

### Is Workover Assistant free?

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

### Is TallyRig free?

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

### Which has better reviews, Workover Assistant or TallyRig?

Workover Assistant is rated higher. Workover Assistant averages 5.0 out of 5 from 2 ratings, while TallyRig averages 4.0 from 1 ratings.

### Do Workover Assistant or TallyRig have ads?

Neither Workover Assistant nor TallyRig shows ads.

### Which is updated more often, Workover Assistant or TallyRig?

Workover Assistant ships an update every 58 months, and TallyRig every 3 months. Most recently, Workover Assistant was updated on October 20, 2026 and TallyRig on October 28, 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.*