Seal: Home Canning Safety

USDA processing times, cited

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

USDA-cited home canning companion. Pressure + water-bath processing times, altitude-aware warnings, a symptom-first jar-failure diagnostic. Pay once. No AI. Pay once. No subscription, no ads, no account, no AI. Works offline. Seal is the iOS companion for USDA-tested home canning. Pick a food, set your altitude, and Seal computes the processing time and pressure for your jar size — cited "Per USDA Complete Guide" or "Per NCHFP" inline so you can verify the number against the source. 42 USDA-tested recipes across fruit, tomato, vegetable, meat, fermented, and jam & jelly chapters. Apple recipes show both Ball 38th Edition (2024 acidified) and USDA 2015 sources where the two diverge — Seal never picks a winner. The Moon Dog wedge for Seal is voice: every number cites the source. No "it is safe to…" framing. The 11-item Pre-process Checklist mirrors Iowa State's "potentially deadly canning mistakes." The symptom-first jar-failure diagnostic answers the canonical "my jar did X, is it safe?" question with 13 USDA / NCHFP / Penn State / Iowa State / CDC-cited rows — bulged-lid and spurting-on-unseal cases lead with the CDC botulism triple-negative ("you cannot see, smell, or taste the toxin") before any disposal copy. Features • 42 USDA-tested recipes, each cited to USDA Complete Guide chapter / NCHFP / Ball 38th — verified against NCHFP canonical pages before ship • Altitude-aware processing: water-bath times extend per USDA Part 1 table; pressure-canner PSI looked up by altitude + gauge type, with explicit warning on the weighted-gauge step from 10 → 15 psi at 1,001 ft • 11-item Pre-process Checklist (Iowa State Extension) — every recipe run starts here; no timer until all 11 are confirmed • Process timer with phase prompts (vent → process → cool-down) — voice via AVSpeechSynthesizer, haptic via CoreHaptics, big readable type for hands-busy moments next to the canner • 13-row symptom-first jar-failure diagnostic — DO NOT OPEN gating on bulged lids and spurting-on-unseal cases with CDC botulism framing • Recipe-Alteration Check — the 2-hour vs 24-hour correction window mapped to the right gating question ("did you follow a tested recipe exactly?") so an altered recipe never gets routed to the 24-hour reprocess path • Pumpkin purée and zucchini / summer squash intercepts — both NOT USDA-approved; named warning fires at the food picker before any processing screen loads • Tomato acidification gate — boundary foods require 2 Tbsp bottled lemon juice per quart or 1/2 tsp citric acid per quart; the timer stays disabled until the user confirms the acidification step • Jar log (SwiftData, on-device) — batch history with recipe, jar size, altitude, time, PSI, lot number For home canners working from the USDA Complete Guide to Home Canning, NCHFP, and the Ball Blue Book. Pressure-canner and water-bath users at any altitude. $6.99 one-time. No subscription, no ads, no account, no cloud. Privacy: Seal collects nothing. No analytics, no accounts, no network requests. Your batch log and settings live on your device. Seal presents USDA / NCHFP / Extension guidance for educational purposes. Follow the latest version of any recipe publication (USDA, NCHFP, cooperative extension, Ball) for authoritative safety information. Consult a Master Food Preserver for borderline cases. What Seal does not do: generate recipes with AI. Generative AI hallucinating canning process times kills people. Seal only surfaces USDA-tested data with the source named on every screen.

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Seal is now free to download with a full 48-hour trial — try the process-time calculators and recipe library with no commitment. After the trial, unlock everything forever with a single purchase. No subscription, no ads. Already bought Seal? You keep full access automatically.

Version 1.1

The developer, Roman Kopaliani, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

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    Information

    Seller
    • Roman Kopaliani
    Size
    • 984.1 KB
    Category
    • Food & Drink
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Daria Kopaliani
  • Privacy Policy

    • More by Roman Kopaliani