Comparison

Compound Interest Calc + vs ToRothorNot

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

Head to head
About

Compound Interest Calc +

Calculate compound interest and future investment values with various parameters like principal, interest rate, and additional deposits. Export results to PDF or CSV and compare saved calculations.

Highlights
  • Compound interest calculation
  • Future value projection
  • Support for principal, interest, duration, inflation, and deposits
  • Flexible compounding and deposit frequencies
  • Detailed results including inflation-adjusted balance
  • PDF and CSV export
  • Save and compare calculations
Features
Read full description

Compound Interest Calc + is the best app for quickly calculating compound interest and the future value of investments. Compound Interest Calc + features: · support for starting principal, interest, duration, inflation and additional deposits · support for additions to be made at the beginning or end of the period · daily, weekly, bi-weekly, monthly, bi-monthly, quarterly, semi-annual and annual compound frequency and additions frequency options · results that include final balance, inflation adjusted, total interest and total additions · PDF and CSV (Excel or Numbers) export options · saving of calculations for viewing later · comparing the results of saved calculations · a complete amortization schedule · a beautifully designed interface · available in English, French, and Spanish! I love feedback! I want this app to work for you. Let me know if you’d like to see any additional features or if something is not quite working correctly. You can submit feedback right from within the app.

About

ToRothorNot

This app helps you evaluate Roth conversion strategies and their impact on your retirement. It allows you to compare different scenarios, test Social Security claiming choices, and model various financial factors for individuals and married households.

Highlights
  • Roth conversion strategy evaluation
  • Social Security claiming analysis
  • Scenario comparison
  • Married household modeling
  • ACA subsidy impact exploration
  • Dynamic 'what-if' analysis
Features
Read full description

ToRothorNot helps you evaluate Roth conversion strategies and see how they may affect your retirement savings and draw-downs. Enter your Traditional IRA balance, tax-related inputs, and up to three custom scenarios to compare projected net worth at your chosen target age, end net worth, cumulative costs, and other key planning outcomes. Test Social Security claiming choices and compare scenarios side by side. Interactive charts let you view net worth or differences between strategies, zoom in, and highlight individual strategies. The app also supports married households, including survivor-spouse modeling and separate spouse Social Security timing. Premium unlocks Computed Strategies that automatically test approaches such as No Conversions, Balanced Conversions, Best End Net Worth Found, optimization for net worth at your selected target age, and more. Premium also adds heir-focused comparisons, PDF export of the Summary, CSV export of detailed Results, and dynamic Explore tools for what-if analysis. Explore lets you adjust conversion amounts, Social Security timing, spending, investment growth, annual QCDs, and other planning inputs to see results change. For ACA users, subsidy-aware exploration shows how key income inputs may affect ACA costs and subsidies. Birth month and year inputs refine Social Security, Medicare, and QCD timing, while RMD starting ages follow birth-year rules. Choose standard or custom deductions and adjust the tax inflation assumption, which defaults to 2.5%, to project growth in tax brackets, standard deductions, selected limits, and ACA premiums. ToRothorNot models a broad range of factors, including federal tax brackets, Social Security taxation, the enhanced Senior Deduction, IRMAA surcharges, NIIT, AMT, ACA premiums and subsidies, capital gains taxation, QCDs, and survivor-spouse timing effects. Projections use 2026 federal tax tables and related limits as their starting point. Future indexed amounts are planning estimates, and the app is intended to be updated annually to reflect tax-law and threshold changes. This is an educational planning tool and does not model every IRS worksheet or edge case. It does not guarantee the absolute best strategy, but it can be a practical way to evaluate tradeoffs and prepare for conversations with your advisor.

Screenshots

Compound Interest Calc +4 screens
ToRothorNot4 screens

Verdict

The call

The clearest difference is review sentiment: ToRothorNot at 100% against Compound Interest Calc +'s 36%. ToRothorNot also leads on price (Free vs $2.99) and rating (5.0 vs 4.8). Compound Interest Calc +'s advantage is in-app purchases (none vs 1) and ratings volume (35 vs 4). On update cadence, ads 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

ToRothorNot is free to download; Compound Interest Calc + costs $2.99 up front. ToRothorNot sells 1 one-off in-app purchase. Compound Interest Calc + asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

ToRothorNot holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Compound Interest Calc + has 35 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 36% of Compound Interest Calc +'s written reviews are positive against 100% of ToRothorNot's.

UpkeepUpdate frequency

Compound Interest Calc + ships an update fortnightly, ToRothorNot every 2 weeks. The most recent releases landed on October 26, 2026 and October 18, 2026 respectively.

Scorecard7 real differences · 3 level
Compound Interest Calc + versus ToRothorNot: the parameters behind the verdict, then further details
ParameterCompound Interest Calc +ToRothorNot
Price$2.99Free — better
Rating4.8 (35 ratings)5.0 (4 ratings) — better
Positive reviews36.4% of reviews100.0% of reviews — better
Number of ratings35 — better4
Update frequencyFortnightlyEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.6
Further details — not scored
Size1 MB5 MB
Age rating4+4+
DeveloperAdam FahlmanOrestes Melgarejo

Customer experience

Compound Interest Calc +

All ratings34 ratings
Positive97.1%
Neutral2.9%
Negative0.0%
Written reviews11 reviews
Positive36.4%
Neutral9.1%
Negative54.5%

ToRothorNot

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Compound Interest Calc +

No in-app purchases

1 purchases

ToRothorNot

One-time1
  • Premium Unlock$19.99

Questions

Is Compound Interest Calc + free?
Compound Interest Calc + costs $2.99, with no in-app purchases.
Is ToRothorNot free?
ToRothorNot is free to download, with in-app purchases available.
Which has better reviews, Compound Interest Calc + or ToRothorNot?
ToRothorNot is rated higher. Compound Interest Calc + averages 4.8 out of 5 from 35 ratings, while ToRothorNot averages 5.0 from 4 ratings.
Do Compound Interest Calc + or ToRothorNot have ads?
Neither Compound Interest Calc + nor ToRothorNot shows ads.
Which is updated more often, Compound Interest Calc + or ToRothorNot?
Compound Interest Calc + ships an update fortnightly, and ToRothorNot every 2 weeks. Most recently, Compound Interest Calc + was updated on October 26, 2026 and ToRothorNot on October 18, 2026.

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