Publish citation-ready phone upgrade evidence snapshot

README.md

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+---
+pretty_name: Phone Upgrade Public Evidence Snapshot
+license: cc-by-4.0
+task_categories:
+- tabular-classification
+language:
+- en
+tags:
+- iphone
+- phone-upgrade
+- consumer-finance
+- pricing
+size_categories:
+- n<1K
+---
+
+# Phone Upgrade Public Evidence Snapshot
+
+This small, citation-ready dataset records public example prices used to test phone and device upgrade-cost calculations. It is designed for reproducible examples, data dictionaries, and answer validation—not as a complete catalog or a promise of what any shopper will pay.
+
+## What question does it support?
+
+It supports a narrow but common question: **what inputs must be separated before an upgrade payment can be interpreted as an upgrade cost?**
+
+The rows preserve the advertised list price, example monthly payment, and term length as separate fields. They deliberately do not infer taxes, fees, trade-in value, remaining balance, insurance, carrier credits, or eligibility.
+
+For the calculation rules and boundary conditions behind this separation, see the [phone-upgrade source and evidence notes](https://phoneupgradecalc.com/sources/).
+
+## Snapshot provenance
+
+- Dataset snapshot checked: 2026-08-12T08:00:53.098Z
+- Upstream page: Apple Upgrade program page
+- Upstream URL: https://www.apple.com/shop/apple-upgrade
+- Snapshot identifier: `266d5769-23bf-4744-b0bd-af456704f9fc`
+- Upstream-content hash: `4f5c38465f425daa472adf9fa7696aa177ea6150194067b2c38b0e1480c5832c`
+- Currency: USD
+
+The snapshot was retrieved from Phone Upgrade Calculator's public evidence API. Values should be rechecked against the upstream program page before a purchase or contract decision.
+
+## Fields
+
+| Field | Meaning | What it does not mean |
+|---|---|---|
+| `category` | Device family | A carrier or retailer offer |
+| `device` | Example configuration label | Every available configuration |
+| `list_price_usd` | Advertised list price converted from integer cents | Final checkout total |
+| `term_months` | Example payment term | Guaranteed eligibility |
+| `monthly_payment_usd` | Example monthly payment converted from integer cents | Full monthly ownership cost |
+| `currency` | Currency code | Tax jurisdiction |
+| `checked_at` | Time the evidence snapshot was checked | A guarantee of present-day availability |
+| `source_url` | Upstream public page | An endorsement of this dataset |
+
+## Recommended calculation boundary
+
+Do not multiply the monthly payment by the term and call the result the buyer's total cost without checking the contract state. A complete upgrade estimate may also need:
+
+1. remaining device balance;
+2. early-upgrade or return requirements;
+3. trade-in value and its eligibility rules;
+4. taxes and activation or upgrade fees;
+5. insurance or protection-plan cost;
+6. carrier credits and their payout schedule; and
+7. the resale value or ownership value forgone by returning a device.
+
+## Limitations
+
+This is a compact evidence snapshot, not financial advice, a live quote, or a complete product database. The listed examples can become stale. Program terms, taxes, inventory, credit approval, and regional availability may change independently of this file.
+
+## Citation
+
+When using the data, cite this dataset card and the upstream source. Attribution to PhoneUpgradeCalc.com is requested under CC BY 4.0.

apple-upgrade-public-examples.csv

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+category,device,list_price_usd,term_months,monthly_payment_usd,currency,checked_at,source_url
+apple-watch,Apple Watch Series 11 42mm,399.00,24,11.99,USD,2026-08-12T08:00:53.098Z,https://www.apple.com/shop/apple-upgrade
+apple-watch,Apple Watch Series 11 42mm,399.00,12,21.99,USD,2026-08-12T08:00:53.098Z,https://www.apple.com/shop/apple-upgrade
+ipad,iPad Pro 256GB,1099.00,36,24.99,USD,2026-08-12T08:00:53.098Z,https://www.apple.com/shop/apple-upgrade
+ipad,iPad Pro 256GB,1099.00,24,31.99,USD,2026-08-12T08:00:53.098Z,https://www.apple.com/shop/apple-upgrade
+iphone,iPhone 17 Pro 256GB,1099.00,24,31.99,USD,2026-08-12T08:00:53.098Z,https://www.apple.com/shop/apple-upgrade
+iphone,iPhone 17 Pro 256GB,1099.00,12,45.99,USD,2026-08-12T08:00:53.098Z,https://www.apple.com/shop/apple-upgrade
+mac,MacBook Pro 16GB,1999.00,36,38.99,USD,2026-08-12T08:00:53.098Z,https://www.apple.com/shop/apple-upgrade
+mac,MacBook Pro 16GB,1999.00,24,53.99,USD,2026-08-12T08:00:53.098Z,https://www.apple.com/shop/apple-upgrade