DealReviewer.One
iOS app by Mark Neumann. Finance · Mark Neumann
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- Free to download
- In-app purchases
- Unknown
- Version
- 1.0.1
- Listing last refreshed
- 2026-09-13
View the original store listing
Store description excerpt
The second opinion for your California car deal. Available in English, Spanish, and Russian. DealReviewer.One reviews California car deals with purpose-built, deterministic calculation engines for cash purchases, financing, and leases. Upload a dealer quote, buyer’s order, financing proposal, lease worksheet, screenshot, photo, or PDF. Confirm the extracted figures and the app routes them through a dedicated Cash, Finance, or Lease engine built for California vehicle deals. DETERMINISTIC CALCULATIONS Your totals, comparisons, findings, risk level, and verdict are produced by financial formulas, decimal-based monetary calculations, versioned deal rules, California-specific references, and the evidence you confirm. Generative AI does not calculate or decide whether a deal is acceptable. The same verified inputs produce the same result. THREE PURPOSE-BUILT ENGINES CASH ENGINE Reviews vehicle price, rebates, trade allowance, trade payoff, taxes, government fees, dealer charges, optional products, and the out-the-door total. FINANCE ENGINE Reconstructs amount financed, annual percentage rate, loan term, monthly payment, total payments, finance cost, financed products, trade equity, and negative equity. LEASE ENGINE Reconstructs gross and adjusted capitalized cost, residual value, money factor, monthly payment, amount due at signing, mileage terms, and total lease cost. Each engine uses its own formulas and validation rules. A lease is not treated as an ordinary monthly payment, and a cash purchase is not analyzed as a simplified loan. BUILT FOR CALIFORNIA DealReviewer.One separates government charges from dealer-controlled fees, checks taxes, reviews rebates and credits, identifies optional products, and flags missing or conflicting information. Unknown values are never silently replaced with zero. If a reliable result needs more information, the app asks for it before payment. ONE REVIEW. ONE CLEAR VERDICT. The app returns one clear outcome: • Sign with confidence • Negotiate first • Stop and review The full report shows the dealer’s figures beside DealReviewer.One’s independent calculations. Matching values, questions, removable items, and a clear negotiation target are visually separated. WHAT YOU RECEIVE • A clear verdict with the primary reason • Independently recalculated transaction totals • Dealer figures compared line by line • Optional costs and unexplained differences • A detailed report with supporting evidence • A clear negotiation target • A deal-specific, ready-to-send counteroffer • Print, email, and shareable PDF options • One recheck of the same VIN within seven days ONE VIN, ONE PURCHASE A valid 17-character VIN is required before purchase. One $19.99 in-app purchase includes one review for one VIN and one eligible recheck of that VIN within seven days. A different VIN requires a new purchase. You may upload up to six related dealer documents. Only one needs to display the VIN. You confirm that the others belong
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