FIRE_Calculator vs DueScope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FIRE_Calculator
Visualize your savings and investments growing over time to determine if you are on track for early retirement. Input your financial details and goals to project your future wealth and assess your Financial Independence, Retire Early (FIRE) progress.
- Calculate investment growth
- Set annual return rates
- Add contributions
- Project compound growth
- Set retirement goals
- Visualize financial path
- Assess FIRE readiness
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Take control of your financial future with FIRE Calculator — the most powerful and beautiful Financial Independence, Retire Early planning tool on iOS. Whether you're just starting your savings journey or fine-tuning your retirement strategy, FIRE Calculator gives you everything you need to plan with confidence. ALL YOUR DATA STAYS ON YOUR DEVICE No account required. No internet needed. 100% private. 4 FIRE STRATEGIES Lean FIRE — Minimalist lifestyle, fastest path to freedom Regular FIRE — Comfortable retirement without compromise Fat FIRE — Luxurious retirement, maximum financial security Coast FIRE — Reach your number, then stop contributing POWERFUL CALCULATIONS - Instant FIRE Number based on the proven 4% Rule - Year-by-year portfolio projection up to 60 years - Inflation-adjusted real return calculations - Social Security and pension income offset - Safe Withdrawal Rate (SWR) from 2% to 6% VISUAL INSIGHTS - Interactive portfolio growth chart - Balance, contributions, growth and withdrawal views - FIRE milestone tracker — $100k, Half FIRE, Coast FIRE, Full FIRE - Real-time progress bar toward your FIRE number SCENARIO PLANNING - Save and compare up to 10 different scenarios - Adjust return rate, expenses, contributions instantly - See the impact of pension and Social Security income LEARN AS YOU GO - Built-in guide explaining every FIRE concept - The 4% Rule explained simply - Lean, Regular, Fat, and Coast FIRE breakdowns - Safe Withdrawal Rate guide Start your journey to Financial Independence today. Your FIRE date is closer than you think.
DueScope
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The app makes it easier for you to manage your receivables and payables. You can sort your created invoices by due date and analyze your payment obligations. It is possible to assign the individual invoice amounts to variably definable time intervals in order to identify which amounts are due for payment within which periods. Graphical evaluations visualize the situation. The analysis is based on your CSV file, which must contain three pieces of information: 1. Debtors (your debtors) or creditors (your creditors) 2. Invoice amounts 3. Due dates The evaluated due date structure can be exported in CSV format. The app is primarily aimed at small and medium-sized entrepreneurs and external auditors in factoring. Procedure: Specify whether you want to evaluate your receivables or payables. Specify which number format (e.g., thousand or decimal separator), which date format, and which separator your CSV file uses (e.g., comma or semicolon). This allows you to remain independent of the export format of your accounting program. Would you like to know which invoices are 30, 60, or 90 days past due? Decide for yourself which time intervals are of interest to you. The individual periods can be freely selected. Then simply upload a list of outstanding receivables or payables to the app. Before doing so, make sure that your list contains the payers or payees, the respective invoice amounts, and the corresponding due dates. Alternatively, you can generate sample data to test the app's functions. Now view the invoice amounts aggregated per debtor or creditor, which have been automatically assigned to the due date intervals you defined. Review your individual due date structure in various chart types. Who is your largest debtor or creditor? Graphical evaluations of concentrations facilitate analysis. Export the due date structure table to further process the information in other applications.
Screenshots
Verdict
The clearest difference is update cadence: DueScope at every 3 weeks against FIRE_Calculator's every 10 months. FIRE_Calculator's advantage is iOS requirement (13.0 vs 17.6). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
FIRE_Calculator ships an update every 10 months, DueScope every 3 weeks. The most recent releases landed on October 17, 2026 and October 25, 2026 respectively.
| Parameter | FIRE_Calculator | DueScope |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 6 MB | 41 MB |
| Age rating | 4+ | 9+ |
| Developer | Feng chen | Stephan Mett |
In-app purchases
FIRE_Calculator
No in-app purchases
DueScope
No in-app purchases









