CompoundIQ vs Coastful
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CompoundIQ
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Future Value Calculator — See Your Money Grow Ever wonder how much your savings or investments could be worth in the future? Future Value Calculator gives you an instant, clear picture of how compound interest works for you over time. Whether you're planning for retirement, saving for a goal, or just curious about the power of compounding, this app makes it simple. What You Can Calculate: Enter your starting balance, annual contributions, interest rate, and time horizon — and instantly see your projected future value broken down year by year. Key Features: Growth chart showing your balance over time Year-by-year breakdown table Principal vs. interest earned at a glance Choose between beginning or end of year contributions Annual, monthly, quarterly, and daily compounding options Clean, intuitive interface designed for everyday use Who It's For: Anyone building a savings or investment plan Students learning about compound interest Financial planning beginners Anyone curious about their money's future potential Free to Use Future Value Calculator is completely free with no subscriptions or paywalls.
Coastful
Calculate your exact retirement or Coast FIRE year based on your real expenses, portfolio allocation, and chosen assumptions. Model inflation, run what-if scenarios, and track your net worth with this offline, privacy-focused financial planning tool.
- Customizable FIRE year projection
- Personalized Safe Withdrawal Rate (SWR)
- Net worth tracking with history
- Real-dollar inflation modeling
- What-if scenario analysis
- Offline functionality
- Privacy-focused design
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Know the exact year you can stop working - or stop saving. Coastful is the Coast FIRE and retirement calculator built around YOUR portfolio. Project the year you can retire from real expenses, your real allocation, and the assumptions YOU choose. Whether you're planning Coast FIRE, Lean FIRE, or Fat FIRE, the math runs on your actual asset mix - not a textbook 4% rule. Coastful also models real-dollar inflation and runs what-if scenarios to show how any change moves your FIRE year. Your data lives on your device. No bank logins, no accounts, no ads. Use Coastful purely offline. ---------------------------------------- FREE - the personalized calculator PERSONALIZED SAFE WITHDRAWAL RATE A real-return SWR built from your actual asset mix - not a generic 4%. Sample portfolio: Base 4.0% becomes Personal 3.1%, a more honest FIRE number. Set an expected return per asset and tune your own inflation assumption. YOUR FIRE YEAR, TWO WAYS Tell Coastful what you save and see the year you reach FIRE - or set a target date and see the savings needed to get there. NET WORTH, TRACKED Net-worth dashboard with year-over-year history and allocation by category. Snapshots build your history over time. Quick-update any value with a one-tap pencil, or batch-update at month-end. Track up to 10 assets, in 30+ currencies with daily auto-conversion. INFLATION, MODELED Every future dollar in your projection is discounted by inflation - the chart is real-dollar, not nominal, and tunable to your view. ---------------------------------------- COASTFUL PRO COAST FIRE SIMULATION Find the year you can stop contributing - and let compounding finish the job on time. Sample portfolio: stop saving 2036, retire by 2056. WHAT-IF SCENARIOS See how a change today moves your FIRE year: - Save $500 more / month: 7 years faster - Market drops 30% in 3 years: 5 years delayed - Upgrade home $368K to $700K: 7 years delayed UNLIMITED ASSETS Track every account, property, and holding - no 10-asset cap. iCLOUD SYNC Keep your assets, snapshots, and FIRE plan in step across all your iPhones and iPads through your own private iCloud. Coastful Pro is available as a monthly subscription or a one-time lifetime purchase that includes all future Pro features. ---------------------------------------- PRIVACY BY DESIGN - Your data lives on your device. No backend account. iCloud Sync (Pro) moves your data through your own iCloud account, not our servers. - No bank logins - you enter your own values. - No ads, no ad SDKs, no third-party trackers. Anonymous usage analytics are opt-in, never include any financial amounts, and can be turned off in Settings. - Optional Face ID / Touch ID lock on every launch. - Your exports and imports stay on your device. ---------------------------------------- Terms of Use (EULA): https://zwstudiollc.com/terms.html Privacy Policy: https://zwstudiollc.com/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: CompoundIQ at none against Coastful's 2. CompoundIQ also leads on update cadence (every 6 days vs fortnightly). Coastful's advantage is ads (none vs shown). On price, device support and iOS requirement 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. Coastful sells 2 in-app purchases, starting at $1.99 per month. CompoundIQ asks for nothing beyond the download.
CompoundIQ ships an update every 6 days, Coastful fortnightly. Both last shipped on October 25, 2026.
| Parameter | CompoundIQ | Coastful |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 6 days — better | Fortnightly |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Nicholas Costa | ZW Studio LLC |
In-app purchases
CompoundIQ
No in-app purchases
Coastful
- Coastful Pro (Monthly)3 Days trial$1.991 Month
- Coastful Pro (Lifetime)$19.99









