Seraph Retirement Planner

Seraph Retirement Planner

Monte Carlo Money Simulator

18 ratings
6 reviews
Free

Details

  • Released
  • Updated
  • July 20, 2026
  • September 25, 2026

Features

Seraph Retirement Planner video #1 for iPhone
Seraph Retirement Planner screenshot #2 for iPhone
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Seraph Retirement Planner screenshot #7 for iPhone
Seraph Retirement Planner screenshot #8 for iPhone
Seraph Retirement Planner screenshot #9 for iPhone
Seraph Retirement Planner screenshot #10 for iPhone
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About

This app simulates thousands of market futures and lifespans to estimate your chance of financial solvency in retirement. It models income, expenses, accounts, debt, and life events with a real US tax engine. Understand key insights and track your progress against your plan.

✓Monte Carlo retirement simulations
✓Comprehensive financial modeling
✓Real US tax engine
✓Couples planning
✓Social Security optimization
✓Healthcare cost projection
✓Life event scenario planning
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+1

What's New in Seraph Retirement Planner

1.75

September 25, 2026

-Now supports landscape mode -Engine improvements including refined medical costs, improved handling of Roth conversions alongside capital gains -Bug fixes

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User reviews

Powerful

One of the most advanced Monte Carlo sims ive used.

Winner winner

Originally explored a competing product called Retirement Success Graph which is a bug-riddled, money-scamming mess. THIS ONE however is the REAL DEAL. I hope the dev keeps it rolling and keeps promises to early adopters. I chose it primarily for its apparent commitment to user data privacy, no 3rd party data shares and a stated commitment to not sell, share or rent user inputs. That said, this app is a truly solid start on retirement planning. Chock full of features (that actually work!) and flexibility in functioning. Can add extra income streams, customize anticipated market conditions, and fine tune Monte Carlos. And
A lot more. A DEF “GET IT NOW” app and an invaluable intellectual and number-crunching investment in the future. Free at the moment (and supposedly guaranteed for early users!) but well worth a small price tag as-is and if developed more.
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95%

This app fills a gap left by many calculators. Demonstrates the impact of many planning decisions in clear way. You can learn strategies available to you by playing around and comparing scenarios. Don’t know whether to covert to Roth or when to start, just run a comparison. Want to know if moving to smaller home can help, run a comparison.

It includes models of things that are enormously difficult to estimate like home insurance costs, property taxes, medical bills, Medicare income penalties.

New features are being added very rapidly without sacrificing app stability. This is clearly well developed software.

It would be even better with:

1. 401k multiple matching levels.

2 HSA, spending strategies: pay medical expense first, or use medical receipt banking to create a tax advantaged emergency fund.

3 Finer granularity on how excess money gets invested. Do I up my my 401k? Roth or pre tax? And so on. Can I save cash until HSA + cash = minimum emergency value, or just cash, and then do Roth conversions?

4. A little more clarity on fenceposts. Does retire at 60 mean I work till my 61st birthday or I work till my 60th birthday? If I have an expense that occurs when I retire, should I say it occurs when I am 60 or 61. This matters a lot. What you do the year you retire has outsized impact on everything downstream from healthcare costs taxes, sequence of return risks, and total retirement expenditure. As is, it is easy to have where numbers in cash flow during this transition year. Also, some events or spending boundaries move with retirement age and some are fixed. Some you can set the behavior. Some you can’t. This makes the impact of changing retirement age difficult to interpret.
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Response from developer

Wow thank you for the detailed feedback. Got lucky that I was nearing the next big release and I was able to fit in critical items from this list (including delete buttons in addition to swipe to deletes that I had before). New version is live, please update!

95%

This app fills a gap left by many calculators. Demonstrates the impact of many planning decisions in clear way. You can learn strategies available to you by playing around and comparing scenarios. Don’t know whether to covert to Roth or when to start, just run a comparison. Want to know if moving to smaller home can help, run a comparison.

It includes models of things that are enormously difficult to estimate like home insurance costs, property taxes, medical bills, Medicare income penalties.

It crashes when I try to delete a life event.

It would be even better with:

1. 401k multiple matching levels.

2 HSA, spending strategies: pay medical expense first, or use medical receipt banking to create a tax advantaged emergency fund..

3 Finer granularity on how excess money gets invested. Do I up my my 401k? Roth or pre tax? And so on. Can I save cash until HSA + cash = minimum emergency value, or just cash, and then do Roth conversions?
Show more

Response from developer

Wow thank you for the detailed feedback. Got lucky that I was nearing the next big release and I was able to fit in critical items from this list (including delete buttons in addition to swipe to deletes that I had before). New version is live, please update!

Very helpful!

Very useful for scenario planning and understanding how different changes can impact what finances look like later on.

Developer apps

FAQ

What is HailCat's core function?

HailCat is a retirement planning tool that uses Monte Carlo simulations to estimate your probability of financial solvency. It models various financial aspects and market futures to provide an honest outlook on your retirement plan.

How does HailCat handle taxes?

The app features a real 2026 US tax engine, including federal and all 50 state taxes, capital gains, NIIT, RMDs, and payroll taxes. It also models the tax implications of Social Security benefits and Roth conversions.

Is HailCat suitable for couples?

Yes, HailCat supports couples planning with features like dual lifespans, survivor benefits, spousal rollovers, and tax changes based on filing status.

Does HailCat include Social Security planning?

Yes, HailCat incorporates real Social Security claim age math (62 to 70), cost of living increases, survivor rules, and the actual taxation of benefits.

How does HailCat model market returns?

Instead of a single straight-line return, HailCat uses a multi-asset market model that includes US and international stocks, bonds, REITs, and cash for more realistic simulations.

Is HailCat free to use?

HailCat is currently free for early adopters. While advanced features may move to a subscription later, early users receive full access. The app is rated 5.0 stars from 2 ratings.

Does HailCat have ads?

No, HailCat is ad-free. The app is designed with privacy in mind, and no advertisements are present.

What devices does HailCat support?

HailCat is available on iPhone and iPad, supporting iOS devices.