Comparison

Sealing Materials Selector vs Thread Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sealing Materials Selector

Easily find the right sealing materials by entering specifications like temperature and hardness. Filter by chemical compatibility, approvals, or product type for O-Rings, Quad-Rings, and V-Rings. Request material datasheets directly through the app.

Highlights
  • Search by material specifications
  • Filter by temperature and hardness
  • Chemical compatibility filtering
  • Institute approvals filtering
  • Product type filtering (O-Rings, Quad-Rings, V-Rings)
  • Request material datasheets
Features
Read full description

Sealing Materials Selector app allows you to easily search Trelleborg Sealing Solutions materials. By simply entering Material Specifications, like for example Material Group, in combination with your required parameters, such as temperature or hardness, the app instantly proposes the right materials for your need. In addition, you can filter down your search based upon chemical compatibilities, institute approvals or by product type for O-Rings, Quad-Rings and V-Rings. You even can request Material Datasheets through the app, if available.

About

Thread Calculator

This app provides a quick and easy way to calculate thread dimensions for various units, including tap hole sizes and bolt specifications. It helps metalworkers find precise measurements for internal and external threads without consulting tables.

Highlights
  • Thread cutting calculator for multiple units
  • Cold forming calculator
  • Thread repair calculator
  • Tap hole and bolt diameter calculation
  • Saves time compared to tables
Features
Read full description

The app includes: - A calculator for thread cutting for the following units: M, MF, UNC, UNEF, UNF, UNR, UNS, NPT, NPTF, NPSC, NPSF, NPSL, NPSM, BA, BSP, BSF, BSW, BSPP, TR, and TRF - A calculator for cold forming - A calculator for thread repair You want to know which tap hole you should drill for threading or which bolt you should use? With this app, you will find the desired measures in no time: Simply select the desired thread type, nominal size, and pitch and you will get the matching diameter for your project. This saves precious time you would have spent tediously searching for internal and external thread dimensions in tables. As this app is still in its development phase, new features will follow soon, so stay tuned! GSR Gustav Stursberg GmbH is a manufacturer for high-quality thread cutting tools with 130 years of operational experience in the area of threading tool production. The product portfolio includes a wide selection of tools for different areas of application. GSR taps, twist drills, round dies, and tool holders are manufactured to the highest quality standards in our own production facilities. The constant quality control during the production process guarantees a consistent good quality in all national as well as international production facilities. This requires enormous precision, which is reflected by our tools. Precision is in the details. Since 1889.

Screenshots

Sealing Materials Selector4 screens
Thread Calculator4 screens

Verdict

The call

The clearest difference is rating: Sealing Materials Selector at 5.0 against Thread Calculator's 4.3. Sealing Materials Selector also leads on ads (none vs shown) and monetization model (free vs ad-supported). Thread Calculator's advantage is ratings volume (13 vs 2). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Sealing Materials Selector holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Thread Calculator has 13 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Sealing Materials Selector ships an update every 11 months, Thread Calculator every 18 months. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
Sealing Materials Selector versus Thread Calculator: the parameters behind the verdict, then further details
ParameterSealing Materials SelectorThread Calculator
PriceFreeFree
Rating5.0 (2 ratings) — better4.3 (13 ratings)
Positive reviews—33.3% of reviews
Number of ratings213 — better
Update frequencyEvery 11 months — betterEvery 18 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.0 — better
Further details — not scored
Size15 MB25 MB
Age rating4+4+
DeveloperTrelleborg Sealing SolutionsGSR Gustav Stursberg GmbH

Customer experience

Sealing Materials Selector

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Thread Calculator

All ratings13 ratings
Positive84.6%
Neutral7.7%
Negative7.7%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

Sealing Materials Selector

No in-app purchases

None

Thread Calculator

No in-app purchases

Questions

Is Sealing Materials Selector free?
Sealing Materials Selector is free to download, with no in-app purchases.
Is Thread Calculator free?
Thread Calculator is free to download, with no in-app purchases.
Which has better reviews, Sealing Materials Selector or Thread Calculator?
Sealing Materials Selector is rated higher. Sealing Materials Selector averages 5.0 out of 5 from 2 ratings, while Thread Calculator averages 4.3 from 13 ratings.
Do Sealing Materials Selector or Thread Calculator have ads?
Thread Calculator shows ads; Sealing Materials Selector does not.
Which is updated more often, Sealing Materials Selector or Thread Calculator?
Sealing Materials Selector ships an update every 11 months, and Thread Calculator every 18 months. Most recently, Sealing Materials Selector was updated on October 12, 2026 and Thread Calculator on October 13, 2026.

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