# SampleChain: COC Field Log — Samples, Custody & PDF Forms

> Samples, Custody & PDF Forms (iPhone/iPad app by SHINOBU MIYAHIRA.)

- Source: https://appshunter.io/ios/app/samplechain-coc-field-log/id6792272112 (this page in markdown: same URL + `.md`)
- Developer: [SHINOBU MIYAHIRA](https://appshunter.io/developer/6782739570)
- Category: Business, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-07-28
- Data updated: 2026-07-30
- User reviews in markdown: https://appshunter.io/ios/app/samplechain-coc-field-log/id6792272112/reviews.md

## What is SampleChain?

SampleChain is an offline chain-of-custody worksheet for environmental and industrial-hygiene field work.

COC FORMS IN THE FIELD
- Create a COC with client, site, laboratory, sampler and cooler details
- Add sample rows fast: sample ID, matrix, location, collection time, containers, preservation and requested analysis
- Free for 3 COC records (10 samples each) - every feature included

CUSTODY THAT HOLDS UP
- Relinquished, Received and Shipped events with names, initials and times - entered by you
- Saved events are never overwritten: corrections are appended as their own entries, so your sequence stays intact

REUSE WHAT YOU TYPE
- Lab presets and organization defaults fill repeated fields automatically

LAB-READY OUTPUT
- COC PDF with the full sample table and custody sequence
- CSV export of samples for your project files

PRIVATE BY DESIGN
- 100% offline. No account, no cloud, no analytics

PRICING
Free for up to 3 COC records with 10 samples each; existing records stay viewable and exportable forever. Pro (unlimited COCs and samples) is an auto-renewing subscription - $19.99/month or $149.99/year - with a 7-day free trial. It renews unless cancelled at least 24 hours before the period ends. Manage or cancel anytime in Settings > Apple ID > Subscriptions.

For record-keeping only. Entries are user-reported and not identity-verified.

Privacy Policy: https://goonobu-dot.github.io/batch18-pages/samplechain/privacy.html
Support: https://goonobu-dot.github.io/batch18-pages/samplechain/support.html
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Yearly | $149.99 | per year |
| Pro Monthly | $19.99 | per month |



## Version history (last 1 release)

### 1.0 — 2026-07-28

No release notes.

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All apps by SHINOBU MIYAHIRA: https://appshunter.io/developer/6782739570

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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 2026-07-30.*