# Drillstring Toolbox vs TallyRig

The clearest difference is in-app purchases: Drillstring Toolbox at none against TallyRig's 1. TallyRig's advantage is update cadence (every 3 months vs every 39 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Drillstring Toolbox ships an update every 39 months, TallyRig every 3 months. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Drillstring Toolbox | TallyRig |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 1 MB | 33 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bureau Veritas North America, Inc.](https://appshunter.io/developer/1770295442) | [嘉炜 丰](https://appshunter.io/developer/1759511819) |

## What reviewers say

### Drillstring Toolbox

[App page](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189)

This utility app calculates drill-stem load capacities based on API connections and sizes. It also provides makeup torque and tensile capacity, as well as tensile and torsion capacities for drill pipe tubes.

**Highlights:** Drill-stem load capacity calculation, API connection selection, Makeup torque calculation, Tensile capacity calculation, Drill pipe tube capacities

**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 Drillstring Toolbox free?

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

### Is TallyRig free?

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

### Do Drillstring Toolbox or TallyRig have ads?

Neither Drillstring Toolbox nor TallyRig shows ads.

### Which is updated more often, Drillstring Toolbox or TallyRig?

Drillstring Toolbox ships an update every 39 months, and TallyRig every 3 months. Most recently, Drillstring Toolbox was updated on October 7, 2026 and TallyRig on October 6, 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.*