# Flux: Glaze Chemistry — UMF, limits & food-safe glazes

> UMF, limits & food-safe glazes (iPhone/iPad app by Roman Kopaliani.)

- Source: https://appshunter.io/ios/app/flux-glaze-chemistry/id6778017216 (this page in markdown: same URL + `.md`)
- Developer: [Roman Kopaliani](https://appshunter.io/developer/1635315269)
- Category: Utilities, Lifestyle
- Price: Free (on sale, was $9.99)
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, European Spanish
- Released: 2026-06-11
- Data updated: 2026-08-31
- User reviews in markdown: https://appshunter.io/ios/app/flux-glaze-chemistry/id6778017216/reviews.md

## What is Flux?

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

Flux is the iOS glaze chemistry calculator for studio potters. Enter a recipe by weight percent, pick a target cone, and Flux computes the unity molecular formula (UMF) live as you edit. Limit-formula warnings cite the source they came from — Digitalfire, Sue McLeod cone 6, Hesselberth & Roy cone 6, Arbuckle-Cushing — so you can judge between them instead of taking one calculator's range as gospel.

The Moon Dog wedge for Flux is voice: warnings frame the recipe as a comparison to a named target, not a "limit violation." Tony Hansen's framing — outside the range isn't broken, inside the range isn't automatically food-safe — is built into how every advisory reads.

Features
• Recipe entry → UMF result, computed live as you change weights or cone
• Limit-formula warnings sourced to Digitalfire / Sue McLeod cone 6 / Hesselberth & Roy cone 6 / Arbuckle-Cushing (cone 5-6 and 9-10) — each warning cites the source by name
• Food-safety advisory: PbO and CdO are red flags; BaO is surfaced with Digitalfire's leach-test caveat; Si:Al ratio is checked against the matte / satin / gloss / underfire windows; cone-6 silica minimum (Hesselberth-Roy 2.5) is enforced at cone 6 only
• 55 preloaded materials — Custer, G-200, Minspar 200, Nepheline Syenite, Mahavir Potash, Cornwall Stone, Spodumene, Petalite, Plastic Vitrox, EPK Kaolin, OM-4, Grolleg, Tile 6, Wollastonite, Whiting, Dolomite, Talc, Magnesium Carbonate, Strontium Carbonate, Zinc Oxide, Lithium Carbonate, Ferro Frit 3110 / 3124 / 3134 / 3195 / 3249 / 3269, Gerstley Borate, Gillespie Borate, Boric Acid, the standard colorant + opacifier oxides, and more
• Custom materials — add your own bag with its oxide analysis, LOI, and a source note, then pick it in any recipe
• Cone 06, cone 6, and cone 10 with Orton self-supporting maturity temperatures
• Flux balance (R₂O : RO) and Si:Al ratio surfaced beside the UMF
• Materials library with full oxide analysis (calcined basis), LOI, named source per material (Glazy CC-licensed data or Digitalfire), and toxicity advisories
• Share any recipe as JSON (Glazy-shaped schema) or as a single-page PDF — title, materials, UMF table, warnings, food-safety status, notes, sources footer
• SwiftData persistence — recipes save automatically as you edit; nothing leaves your device
• Localized in English, German, Spanish, French, Italian, and Japanese
• Universal app for iPhone and iPad

For studio potters working at cone 06, cone 6, and cone 10. Hobbyists with a wheel and a kiln, production potters dialing in a cone-6 base, and ceramics teachers explaining why a glaze runs.

$9.99 one-time. No subscription, no ads, no account, no cloud.

Privacy: Flux collects nothing. No analytics, no accounts, no network requests. Your recipes and settings live on your device. Material chemistry data is bundled in the app at install time and never touches the network either.

Material chemistry data is sourced from Glazy (CC-licensed) and cross-referenced against Digitalfire. Limit-formula targets are cited per source in every warning. The food-safety advisory is heuristic — leach testing remains the only definitive answer for whether a glaze is food-safe.


## Version history (last 4 releases)

### 1.3 — 2026-08-23

Maintenance update. No feature changes.

### 1.2 — 2026-07-07

Flux is now free.

Download and use the full glaze calculator — recipe entry, unity molecular formula, and the complete material library — at no cost. Unlock Flux Pro with a one-time purchase (no subscription) for the named-source limit-formula warnings, the food-safety advisory, JSON/PDF export, and custom materials.

Already bought Flux? Thank you — you keep everything, automatically.

### 1.1 — 2026-06-23

Flux now speaks German, Spanish, French, Italian, and Japanese.

• Custom materials: add your own bag — oxide analysis, LOI, and a source note — and pick it in any recipe
• New named source: Val Cushing's cone 5-6 and cone 9-10 limit ranges (via Linda Arbuckle's handout) join Digitalfire, Sue McLeod, and Hesselberth & Roy
• Sharper App Store subtitle and keywords, a rate-the-app ask, and small fixes

### 1.0 — 2026-06-11

No release notes.

## More apps by Roman Kopaliani

- [Soak: Hot Tub & Spa Calc](https://appshunter.io/ios/app/soak-hot-tub-and-spa-calc/id6775030424)
- [Frost: Cold Plunge Care](https://appshunter.io/ios/app/frost-cold-plunge-care/id6776702484)
- [Reef: Aquarium Chemistry Calc](https://appshunter.io/ios/app/reef-aquarium-chemistry-calc/id6776750986)
- [Pond: Koi Chemistry](https://appshunter.io/ios/app/pond-koi-chemistry/id6777459595)
- [Watt: Solar for Van & RV](https://appshunter.io/ios/app/watt-solar-for-van-and-rv/id6777471058)
- [Saline: Saltwater Pool Calc](https://appshunter.io/ios/app/saline-saltwater-pool-calc/id6777715538)

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 2026-08-31.*