Drill Collar vs Workstrings
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Drill Collar
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Drill Collar app is database of Ideal Drill Collar Range. When select Open Hole Size, the app will show below data: - CASING SIZE TO BE RUN, inch - IDEIAL DRILL COLLAR RANGE, inch - API DRILL COLLAR SIZES WHICH FALL IN THE IDEAL RANGE, inch The minimum size drill-collar is calculated from the Lubinski and Hock equation. Easy. Simple. Useful. Work Safe!
Workstrings
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.
- Search product specifications
- View detailed spec sheets
- Download specification documents
- Share product information
- Browse tubular goods
- Access Worktech Joints specs
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The Workstrings International Spec Sheet finder allows you to search for, view, download, and share specifications for a variety of Workstrings' products including Drill Pipe, Landing String, Heavy Weight Drill Pipe, Drill Collars, Tubing, Completion and Intervention Tubulars, and Worktech Joints
Screenshots
Verdict
The clearest difference is price: Workstrings at Free against Drill Collar's $0.99. Workstrings also leads on update cadence (every 8 days vs every 36 months) and iOS requirement (13.0 vs 16.4). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Workstrings is free to download; Drill Collar costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Drill Collar ships an update every 36 months, Workstrings every 8 days. The most recent releases landed on September 21, 2026 and June 10, 2026 respectively.
| Parameter | Drill Collar | Workstrings |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 5.0 (14 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 14 — better |
| Update frequency | Every 36 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.4 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 135 MB |
| Age rating | 4+ | 4+ |
| Developer | zhandos uakanov | SESI Holdings, Inc. |
In-app purchases
Drill Collar
No in-app purchases
Workstrings
No in-app purchases
