Comparison

RetirementTracker vs 3D Topology Optimizer

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

Head to head
About

RetirementTracker

This app calculates the remaining workdays until your retirement, factoring in weekends, public holidays, and vacation days. It offers customizable countdowns, milestone tracking, and scenario planning to visualize your retirement goals.

Highlights
  • Workday countdown calculation
  • Deducts weekends, holidays, and vacation
  • Customizable retirement date and work schedule
  • Milestone and reminder setting
  • Scenario planning for 'what-if' situations
  • Supports public holidays for 22 countries
  • Home and Lock Screen widgets
Features
Read full description

How many workdays are left until you retire? RetirementTracker counts not just the calendar days until your retirement date, but your real workdays – weekends, your region's public holidays and your vacation are already deducted. Up to date every day, live down to the second. Whether retirement is months or many years away, RetirementTracker keeps your finish line in view. THE LIVING CALENDAR PAGE • Your countdown as a tear-off calendar: tap the page to see calendar days, workdays, weeks or percent • On each new day, yesterday's sheet tears off • Quote of the day: save your favorites or share them • Your next milestone, plus the Mondays, weekends, paydays and public holidays still ahead of you • Career progress: what percentage of your working life is already behind you? • Share your countdown as an image – in two designs • A calm design in light and dark, with your own photo if you like TRANSPARENT CALCULATION No guesswork: "How it's calculated" shows how your workdays add up – calendar days minus days off, public holidays and vacation, including the vacation you haven't planned yet. YOUR RETIREMENT PLAN, YOUR RULES • Retirement date, workweek (full-time, part-time or your own workdays), vacation days per year and the days you have left this year • Work phases: fewer workdays, a release from work before retirement, or a last workday before your retirement date • Scenarios: save what-if plans, compare them and adopt the one you like • Optional: your career start date for your career progress MILESTONES & REMINDERS • Automatic milestones such as 1,000, 500 or 100 days left • Your own milestones for personal stages • Reminders on the day and the day before – at the time you choose VACATION, HOLIDAYS & LONG WEEKENDS • Public holidays for 22 countries: the US (federal holidays), Canada with every province and territory, the UK, Ireland, Australia with every state and territory, Germany with all 16 states, Austria, Switzerland with every canton, France, Italy, Spain, the Netherlands, Belgium, Luxembourg, Poland, Sweden, Norway, Denmark, Finland, Japan, South Korea and Singapore • Vacation calendar with your vacation, public holidays and your own days off • Your employer gives extra days off, or a holiday is missing? Add them yourself – they count in the calculation • Find time off: combine public holidays and a few vacation days into long weekends and longer breaks WIDGETS WITH PREMIUM • 7 Home Screen widgets: workdays, calendar days, progress, motivation, facts, milestone and photo • Lock Screen widgets: round, as a card or as a line above the clock • Tap the number to switch: days, workdays, weeks or percent • Most widgets in light and dark APPLE WATCH WITH PREMIUM • Your countdown on your wrist: the calendar page, your next milestone and the quote of the day • Complications for your watch face • The watch gets its figures from RetirementTracker on your iPhone Premium is a one-time purchase – no subscription. YOUR DATA STAYS WITH YOU All your details stay on your devices. No account, no sign-up. IN 10 LANGUAGES English, German, French, Italian, Spanish, Dutch, Japanese, Korean, Portuguese and Polish. GETTING STARTED Choose your country and region, set your retirement date, enter your vacation days – done. If you like, RetirementTracker reminds you of your milestones. Also inside: book tips on retirement, hand-picked for the US. Note: RetirementTracker counts the days until the retirement date you choose. It does not calculate pension amounts, is not affiliated with any pension provider or authority, and does not provide financial or retirement advice. Holiday data without guarantee. Start your retirement countdown today and watch retirement get closer every day.

About

3D Topology Optimizer

Features
Read full description

3D Topology Optimizer reduces the weight of a 3D part without sacrificing its strength — entirely on your device, with no cloud upload required. Load an STL model, mark contact surfaces, applied loads (forces and moments), and functionally important faces that must never change. The app then runs a real finite-element simulation and a SIMP topology optimization directly on iPhone, iPad, or Mac to determine which material actually contributes to strength and which can be removed. FEATURES • Automatic hole detection — cylindrical bores are recognized and automatically protected from the optimizer • Calculated entirely on-device — your geometry and load cases never leave your device • High-resolution STL export for 3D printing or CNC machining • Built-in parametric templates (bushings, brackets) to get started without any CAD file • Wireframe and shaded 3D viewer with axis indicators for precise face tagging WHO IT'S FOR Engineers, product designers, makers, and students who design 3D-printed or CNC-machined parts and want a fast, private way to see where material can be safely removed before committing to a print or a machining run. All calculations are a simplified, linear finite-element approximation and do not replace certified FEA software or review by a qualified engineer. Always verify results independently before manufacturing load-bearing parts.

Screenshots

RetirementTracker4 screens
3D Topology Optimizer2 screens

Verdict

The call

The clearest difference is ads: RetirementTracker at none against 3D Topology Optimizer's shown. 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. RetirementTracker sells 1 one-off in-app purchase and 3D Topology Optimizer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

RetirementTracker ships an update weekly, 3D Topology Optimizer every 6 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
RetirementTracker versus 3D Topology Optimizer: the parameters behind the verdict, then further details
ParameterRetirementTracker3D Topology Optimizer
PriceFreeFree
Rating3.0 (1 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings1 — better—
Update frequencyWeeklyEvery 6 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Mac
Requires iOS16.4 — better17.0
Further details — not scored
Size54 MB17 MB
Age rating4+4+
DeveloperVincent WaelkenMaximilian Benchieb

In-app purchases

1 purchases

RetirementTracker

One-time1
  • Premium-Widgets$1.99
1 purchases

3D Topology Optimizer

One-time1
  • Topology Export$0.99

Questions

Is RetirementTracker free?
RetirementTracker is free to download, with in-app purchases available.
Is 3D Topology Optimizer free?
3D Topology Optimizer is free to download, with in-app purchases available.
Do RetirementTracker or 3D Topology Optimizer have ads?
3D Topology Optimizer shows ads; RetirementTracker does not.
Which is updated more often, RetirementTracker or 3D Topology Optimizer?
RetirementTracker ships an update weekly, and 3D Topology Optimizer every 6 days. Most recently, RetirementTracker was updated on November 5, 2026 and 3D Topology Optimizer on October 31, 2026.

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