Comparison

Thread Calculator vs Vacation Flow

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

Head to head
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.

About

Vacation Flow

Features
Read full description

Vacation Flow is the complete time-off tracking system for your team. Manage vacation, sick leave, and PTO in one clean, easy-to-use dashboard — no more messy spreadsheets, email chains, or guesswork about who's out. Whether you're a startup or a growing company, Vacation Flow gives managers and employees a single place to request, approve, and plan time off. REQUESTS & APPROVALS • Submit time-off requests in seconds • Managers approve or decline with one tap • Instant notifications keep everyone in the loop TEAM CALENDAR • See who's off at a glance in one shared view • Plan around availability and avoid scheduling conflicts • Color-coded leave types for instant clarity WORK MODES • Track remote work, deep-work focus time, and medical leave • Give your team flexibility while keeping visibility LEAVE POLICIES THAT FIT YOUR COMPANY • Custom leave categories • Accrual and carryover rules • Balances calculated automatically GLOBAL & INTERNATIONAL • Built-in support for 100+ countries' public holidays • Perfect for distributed and international teams REPORTS & ANALYTICS • View balances and full leave history • Export data whenever you need it • Automated team summaries delivered by email INTEGRATIONS • Sync time off with Google Calendar FAST SETUP • Import your team and existing data via CSV • Get up and running the same day SECURITY & PRIVACY • Encrypted data and GDPR compliance • Your team's information stays protected WHY TEAMS CHOOSE VACATION FLOW • Real-time tracking with instant approvals • A clear, visual overview of team availability • Frictionless onboarding for the whole team • Replaces spreadsheets with a system people actually enjoy using Start free for up to 20 members. Need more? Our Corporate plan adds professional reporting and direct support for larger teams. Download Vacation Flow and make time-off tracking effortless. Questions? Reach us at info@vacationflow.app

Screenshots

Thread Calculator4 screens
Vacation Flow4 screens

Verdict

The call

The clearest difference is ads: Vacation Flow at none against Thread Calculator's shown. Vacation Flow also leads on update cadence (monthly vs every 18 months). On price, in-app purchases, device support and iOS requirement 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.

UpkeepUpdate frequency

Thread Calculator ships an update every 18 months, Vacation Flow monthly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Thread Calculator versus Vacation Flow: the parameters behind the verdict, then further details
ParameterThread CalculatorVacation Flow
PriceFreeFree
Rating4.4 (14 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings14 — better—
Update frequencyEvery 18 monthsMonthly — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size25 MB39 MB
Age rating4+4+
DeveloperGSR Gustav Stursberg GmbHAndrej Agovski

In-app purchases

None

Thread Calculator

No in-app purchases

None

Vacation Flow

No in-app purchases

Questions

Is Thread Calculator free?
Thread Calculator is free to download, with no in-app purchases.
Is Vacation Flow free?
Vacation Flow is free to download, with no in-app purchases.
Do Thread Calculator or Vacation Flow have ads?
Thread Calculator shows ads; Vacation Flow does not.
Which is updated more often, Thread Calculator or Vacation Flow?
Thread Calculator ships an update every 18 months, and Vacation Flow monthly. Most recently, Thread Calculator was updated on November 3, 2026 and Vacation Flow on October 31, 2026.

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