Master Inventory Catalog
Browse battle-tested, verified turnkey software systems ready for immediate deployment and commercial resale.
Showing 48 software systems in warehouse core under Android APK
InflationErosion Pro: Historical Inflation Purchasing Power
Calculate how much purchasing power $10,000 loses over 10, 20, and 30 years.
EstateNetWorth Pro: Personal Estate & Asset Inventory Sheet
List bank accounts, deeds, vehicles, and heir designations for family peace of mind.
CollegeSavings529 Pro: 529 College Savings Plan Calculator
Project four-year university tuition costs and required monthly contributions.
EmergencyFundCalc Pro: 3-to-6 Month Emergency Fund Target
Calculate your exact bare-bones monthly survival budget to set rainy day targets.
CashStashing Pro: Physical Sinking Funds Envelope Manager
Organize physical cash stashes for car repairs, Christmas gifts, and vacations.
SubscriptionAudit Pro: Recurring Subscription Cost Auditor
Identify overlooked monthly subscriptions and calculate annual cumulative savings.
HomeExpenseSplit Pro: Roommate Rent & Utility Split Ledger
Track who paid what for electric, internet, and groceries with minimal settlements.
MileageTaxDeduction Pro: IRS 67¢/Mile Business Trip Log
Log odometer miles with purpose tags to claim standard mileage tax deductions.
InvoiceGenerator Pro: Instant PDF Contractor Invoice Builder
Generate polished PDF invoices with payment terms and bank details in 60 seconds.
SideHustleLedger Pro: Freelance Revenue & Expense Tracker
Keep a clean record of client payments, software costs, and contractor fees.
RothIraForecaster Pro: Roth IRA Tax-Free Retirement Modeler
Project tax-free retirement wealth accumulation and penalty-free basis withdrawals.
401kGrowth Pro: 401(k) Employer Match Compounding Modeler
Visualize the compounding power of capturing your full employer 401(k) match.
CapitalGainsCalc Pro: Capital Gains Tax Bracket Estimator
Estimate federal tax liabilities on short-term vs long-term stock and crypto gains.
DividendYield Pro: Dividend Yield & Income Forecaster
Calculate monthly and annual passive dividend income from stock portfolios.
StockOptionCalc Pro: Black-Scholes Option Pricing & Greeks
Calculate Delta, Gamma, Theta, and Vega for call and put options offline.
DiamondPriceGuide Pro: Diamond 4Cs Carat & Clarity Estimator
Estimate wholesale market pricing based on cut, color, clarity, and carat weight.
GoldSilverValue Pro: Gold & Silver Bullion Scrap Melt Calc
Calculate exact scrap jewelry value by karat (10k, 14k, 18k, 24k) and troy ounces.
CurrencyConverter Pro: Offline Central Bank Foreign Exchange
Convert between 150+ world currencies using cached official central bank rates.
SalesTaxCalc Pro: Sales Tax, Discount & Profit Margin Tool
Calculate pre-tax and post-tax prices with retailer discount combinations.
TipSplitter Pro: Restaurant Bill & Tip Split Calculator
Split bills fairly across up to 20 guests with tax, custom tip %, and cash round-ups.
CreditCardPayoff Pro: Credit Card Minimum Payment Trap Calc
Reveal how 24% APR turns a $5,000 balance into 22 years of interest payments.
AutoLoanCalc Pro: Auto Loan Financing & Trade-In Equity Calc
Calculate true monthly car payments including state sales tax and dealer fees.
DebtSnowball Pro: Debt Snowball vs Avalanche Payoff Tool
Compare psychological snowball momentum vs mathematical avalanche interest savings.
MortgagePro: Complete PITI Mortgage & Amortization Tool
Calculate principal, interest, taxes, insurance (PITI), and PMI payoff dates.
FireCalc Pro: Financial Independence Retire Early (FIRE) Calc
Calculate your LeanFIRE, FatFIRE, and CoastFIRE target numbers based on 4% rule.
CompoundInterest Pro: Compound Interest & Dividend DRIP Calc
Simulate 10 to 40 year wealth compounding with monthly recurring contributions.
LoanAmortization Pro: Loan Amortization & Early Payoff Calc
Calculate exact interest savings when paying an extra $100/month on any loan.
NetWorthTracker Pro: Personal Balance Sheet & Net Worth
Track real estate, cash, retirement, and debts with monthly historical growth charts.
CryptoVaultWatch Pro: Cold Watch-Only Crypto Portfolio
Track public Bitcoin and Ethereum addresses with zero private key entry.
VaultBudget Pro: Sovereign Envelope Budgeting & Net Worth
Zero-cloud cash envelope budgeting system with bank-free transaction logging.
PolyRhythmTrainer Pro: 3:2, 4:3 & 5:4 Polyrhythm Master
Separate stereo channel clicks that train both hands to play independent time divisions.
SolfegeTrainer Pro: Do-Re-Mi Solfège Sight-Singing Trainer
Improve pitch accuracy with moveable-Do and fixed-Do sight reading vocal drills.
VocalRangeTest Pro: Singing Voice Range Pitch Detector
Sing into the phone mic to detect your exact lowest note, highest note, and octave count.
VocalWarmups Pro: Vocalist Arpeggio Warm-Up Exercises
Accompaniment piano scales for sopranos, altos, tenors, and basses before shows.
HarmonicaHoles Pro: 10-Hole Diatonic Harmonica Tab Reader
Clean tabs with clear blow/draw arrows and bending half-step note indicators.
TrumpetValves Pro: Trumpet Valve Combinations & Lip Slurs
Interactive three-valve fingering trainer with lip slur exercise audio drills.
SaxophoneCharts Pro: Alto & Tenor Saxophone Transposition
Instant transposition charts between concert pitch and Eb Alto / Bb Tenor sax.
FluteFingering Pro: Complete Chromatic Flute Fingering Chart
Interactive key diagram showing low C to high C fingering options and trills.
CelloScaleGuide Pro: Cello Fingerboard Positions & Scales
Visualize half position through fourth position on the cello neck in bass clef.
ViolinTuner Pro: Violin GDAE Perfect Fifths Orchestral Tuner
Tune violin strings to pure harmonic fifths or equal temperament pitch standard.
BanjoRolls Pro: 5-String Banjo Scruggs Picking Rolls
Practice forward rolls, backward rolls, and fogging mountain breakdowns with audio.
MandolinTuner Pro: Mandolin GDAE Tuning & 2-Finger Chords
Tuning meter and chord charts tailored specifically for traditional folk mandolin.
UkuleleStrummer Pro: Ukulele Strumming Patterns & Rhythms
Master D-D-U-U-D-U and calypso strumming patterns with animated rhythm arrows.
BasslineForge Pro: Bass Guitar Groove Backing Tracks
Drum and piano rhythm tracks across funk, blues, rock, and jazz for bass practice.
GuitarTabReader Pro: Offline Guitar Tab & Chords Viewer
Scroll through thousands of text and GP tabs with auto-scroll speed controls.
NatureWalkAudio Pro: Mountain Stream & Morning Birds Audio
Immerse yourself in mountain wilderness sounds recorded in remote alpine forests.
WindChimePhysics Pro: Generative Pentatonic Wind Chimes
Mathematical physics simulation generating tranquil, non-repeating brass chime notes.
CampfireAcoustics Pro: Cozy Wood Crackle & Ember Soundscape
Natural crackling wood sounds that lower cortisol and prepare mind for deep rest.