Comparison

RetireSure Simulator vs ZBee

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

Head to head
About

RetireSure Simulator

This app simulates retirement scenarios using historical market data to assess your financial plan's success probability. It runs thousands of simulations to account for market volatility and helps you determine safe spending levels and optimal retirement strategies.

Highlights
  • Monte Carlo simulations
  • Historical market data analysis
  • Probability of success calculation
  • Safe annual spending level determination
  • Worst-case scenario testing
  • Compare retirement ages and strategies
Features
Read full description

Will your money last through retirement? RetireSure uses real historical market data to show whether your retirement plan actually works — not just on average, but in good and bad markets. Run 10,000 Monte Carlo simulations based on 76 years of U.S. market returns (1950–2025) and see your true probability of success. Understand your plan clearly: • See your chance of running out of money • Test worst-case market scenarios • Find your safe annual spending level • Model different spending by age range — for SS bridge gap planning • Compare different retirement ages and strategies • Adjust inputs instantly and see results in real time Most retirement calculators assume smooth, average returns. Real markets don't behave that way. RetireSure stress-tests your plan against real historical conditions — including crashes, inflation spikes, and sequence-of-returns risk — so you can make decisions with confidence. Built for serious retirement planning: • No subscriptions — one-time purchase • Outcome range — median, worst 10%, best 10% scenarios • Clean, simple interface • Fast results in seconds • Based on real market history, not assumptions Know where you stand before you retire and how it's going during retirement

About

ZBee

Estimate your safe annual retirement spending after taxes. This tool simulates market histories to provide a realistic withdrawal figure, accounting for various account types and early withdrawal penalties. It offers detailed projections and spending flexibility insights.

Highlights
  • Estimate safe annual retirement spend
  • Accounts for taxes on withdrawals
  • Models different account types (401k, Roth, brokerage)
  • Simulates market histories for stress-testing
  • Visualizes savings projections and spending flexibility
  • Compares retirement age impacts
Features
Read full description

ZBee — estimate your safe yearly spend in retirement, after tax, right on your iPhone or iPad. How much can you safely spend each year in retirement? ZBee gives you a quick, private estimate — on your device, in seconds. Enter your savings, your age, and when you plan to retire, and ZBee estimates the most you can safely spend each year, stress-tested across 600 simulated market histories. No account, no sign-up, nothing to configure. After tax, not before: Most calculators hand you a withdrawal figure and leave the tax bill to you. ZBee works out federal income tax on every year of every simulation — so the number you see is money to actually live on. • It knows the difference between a 401(k), a Roth, and a brokerage account, and taxes each one as you draw it down. • It works out how much of your Social Security is taxable, using the provisional-income rule. • It counts the 10% penalty on retirement money drawn before 59 — so an early retirement gets an honest answer. See the whole picture, not just a number: • A live estimate that updates as you adjust any input, and a risk setting for how cautious you want to be. • Could you afford a specific number? Enter what you want to spend and see how often it lasted. • Your savings, projected. Watch your money grow until you retire and draw down after — charted through a poor market, not a flattering average one. • What waiting buys you. Compare your estimate side by side at earlier and later retirement ages. • When to claim Social Security. See what claiming at 62, 67, or 70 does to your safe spend, each age calculated against your own plan. • Married? Add your spouse's age and Social Security benefit, and ZBee counts both benefits, including the spousal amount when it is larger. • How your spending would flex. Real plans don't spend a fixed number forever — see how much you'd trim after bad markets, and how much more you could spend after good ones. • Still saving? Add what you put away each year and watch it compound into the answer. • Your estimate over time. ZBee remembers each day's estimate on your device, so you can see which way your number is moving. Private by design: • Everything runs entirely on your device. Nothing you enter is sent to us or anyone else. • No account. No tracking. No analytics. The app makes no network requests at all. • No permissions needed. The only prompt you will ever see is if you choose to turn on an optional check-in reminder. ZBee is a measurement and planning tool, not financial advice. Estimates are hypothetical, will not match actual results, and are for U.S. investors. The app estimates federal tax only — it does not model state income tax, Medicare surcharges, or required minimum distributions, and explains what it leaves out in the app.

Screenshots

RetireSure Simulator4 screens
ZBee4 screens

Verdict

The call

The clearest difference is in-app purchases: ZBee at none against RetireSure Simulator's 1. RetireSure Simulator's advantage is ratings volume (3 vs 1). On price, rating, review sentiment and update cadence 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. RetireSure Simulator sells 1 one-off in-app purchase. ZBee asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for RetireSure Simulator against 5.0 for ZBee. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

RetireSure Simulator ships an update every 8 days, ZBee every 10 days. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 8 level
RetireSure Simulator versus ZBee: the parameters behind the verdict, then further details
ParameterRetireSure SimulatorZBee
PriceFreeFree
Rating5.0 (3 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings3 — better1
Update frequencyEvery 8 days — betterEvery 10 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size2 MB1 MB
Age rating4+4+
DeveloperSteve BridgewaterZBee LLC

Customer experience

RetireSure Simulator

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ZBee

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

RetireSure Simulator

One-time1
  • RetireSure Simulator$14.99
None

ZBee

No in-app purchases

Questions

Is RetireSure Simulator free?
RetireSure Simulator is free to download, with in-app purchases available.
Is ZBee free?
ZBee is free to download, with no in-app purchases.
Which has better reviews, RetireSure Simulator or ZBee?
RetireSure Simulator and ZBee are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.
Do RetireSure Simulator or ZBee have ads?
Neither RetireSure Simulator nor ZBee shows ads.
Which is updated more often, RetireSure Simulator or ZBee?
RetireSure Simulator ships an update every 8 days, and ZBee every 10 days. Most recently, RetireSure Simulator was updated on October 17, 2026 and ZBee on October 16, 2026.

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