# FZ SIide Rule vs Workstrings

The clearest difference is rating: Workstrings at 5.0 against FZ SIide Rule's 1.0. Workstrings also leads on ratings volume (14 vs 1). FZ SIide Rule's advantage is iOS requirement (9.0 vs 13.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Workstrings holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: Workstrings has 14 ratings behind it against 1, so its average is the more settled of the two.

FZ SIide Rule ships an update fortnightly, Workstrings every 8 days. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | FZ SIide Rule | Workstrings |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/fz-siide-rule/id1131995319/reviews) | **[5.0 (14 ratings)](https://appshunter.io/ios/app/workstrings/id6740924535/reviews)** |
| Number of ratings | 1 | **14** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 8 days** |
| Monetization | Free | Free |
| Size | 11 MB | 135 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [D Young](https://appshunter.io/developer/933629750) | [SESI Holdings, Inc.](https://appshunter.io/developer/1777501957) |

## What reviewers say

### FZ SIide Rule

[App page](https://appshunter.io/ios/app/fz-siide-rule/id1131995319)

This application provides a digital slide rule for finding critical dimensions of high-pressure wellhead equipment, including integral flange and ring groove measurements. It functions like a traditional paper slide rule, offering convenience and accessibility for users needing these specific engineering calculations.

**Highlights:** Integral flange dimensions, Ring groove dimensions, R Type ring gasket calculations, Pocket-sized slide rule functionality, High-pressure wellhead equipment data

**Features:** macOS Compatibility

**In-app purchases:** none


### Workstrings

[App page](https://appshunter.io/ios/app/workstrings/id6740924535)

Access and share detailed product specifications for a wide range of tubular goods and specialized joints. Easily search, view, and download spec sheets for items like drill pipe, landing string, and drill collars.

**Highlights:** Search product specifications, View detailed spec sheets, Download specification documents, Share product information, Browse tubular goods, Access Worktech Joints specs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is FZ SIide Rule free?

FZ SIide Rule is free to download, with no in-app purchases.

### Is Workstrings free?

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

### Which has better reviews, FZ SIide Rule or Workstrings?

Workstrings is rated higher. FZ SIide Rule averages 1.0 out of 5 from 1 ratings, while Workstrings averages 5.0 from 14 ratings.

### Do FZ SIide Rule or Workstrings have ads?

Neither FZ SIide Rule nor Workstrings shows ads.

### Which is updated more often, FZ SIide Rule or Workstrings?

FZ SIide Rule ships an update fortnightly, and Workstrings every 8 days. Most recently, FZ SIide Rule was updated on September 26, 2026 and Workstrings on October 1, 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.*