# Stack: Firewood & BTU Calc — Cords, seasoning & heat cost

> Cords, seasoning & heat cost (iPhone/iPad app by Roman Kopaliani.)

- Source: https://appshunter.io/ios/app/stack-firewood-and-btu-calc/id6800825572 (this page in markdown: same URL + `.md`)
- Developer: [Roman Kopaliani](https://appshunter.io/developer/1635315269)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-08-20
- Data updated: 2026-08-28
- User reviews in markdown: https://appshunter.io/ios/app/stack-firewood-and-btu-calc/id6800825572/reviews.md

## What is Stack?

Pay once. No subscription, no ads, no account. Works offline.

Stack is the firewood calculator for wood-stove and fireplace owners. Measure a stacked pile and get cords — and what you really paid per full cord. Compare species by BTU with cited numbers. Track every stack you split, log moisture-meter readings, and burn only when the wood is actually ready.

Free forever
• Cord & stack calculator — length × height × depth to cords (a cord is 128 cu ft, per NIST Handbook 130)
• Real price per full cord — never overpay for a short load again
• Face cord / rick converter — see exactly what fraction of a cord a face cord of your piece length is
• Species & BTU chart — 44 species with million BTU per cord, splitting, smoke, sparks, and coaling, from USU Forestry Extension data
• Burn Safe — the EPA Burn Wise moisture target and never-burn list, plus CSIA creosote and chimney-fire guidance

Stack Pro — one-time unlock
• Seasoning tracker — every stack you split: species, time seasoning, and your moisture log. Marked ready to burn only when a fresh-split reading is under the EPA 20% target. The meter decides, not the calendar.
• Winter planner — turn last winter's oil, gas, propane, or electric usage into the cords you actually need
• Wood vs other fuels — everything normalized to dollars per million BTU of delivered heat, the US EIA method
• Value pricing — a $/cord quote becomes $ per MMBtu for that species, so a cheap low-BTU cord can't fool you

Every number names its source: USU Forestry Extension, US EPA Burn Wise, CSIA, NIST, US EIA. No folklore seasoning charts — elapsed time is shown as a planning estimate, and readiness comes from your moisture meter.

For wood-stove owners, fireplace and insert burners, homesteaders, and anyone buying firewood by the cord.

$6.99 one-time for Stack Pro. No subscription, no ads, no account.

Privacy: Stack collects nothing. No analytics, no accounts, no cloud. Your stacks live on your device.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Stack Pro | $6.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-21

No release notes.

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All apps by Roman Kopaliani: https://appshunter.io/developer/1635315269

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*