# Gritorbit: Tumbler Log — Batches, Grit & Barrel Stages

> Batches, Grit & Barrel Stages (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/gritorbit-tumbler-log/id6791312262 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Lifestyle, Productivity
- Price: $3.99
- Age rating: 4+
- Requires: iOS 17.0 · 85 MB
- Released: 2026-07-22
- Data updated: 2026-08-10
- User reviews in markdown: https://appshunter.io/ios/app/gritorbit-tumbler-log/id6791312262/reviews.md

## What is Gritorbit?

Gritorbit is a private rock-tumbling batch lab for hobbyists who want to know exactly what is in every barrel and what happened at each stage.

Build batch cards with stone mix, barrel capacity, load weight, media, grit, start date, inspection notes, and photo references stored outside the app. Use the load workbench to compare entered barrel capacity with rock and media weight, estimate grit demand, schedule the next inspection, and preserve the full lineage from rough through polish.

KEY FEATURES
- Multi-barrel batch and stage records
- Rock, media, grit, and polish inventory
- Load-ratio and grit-demand calculator
- Stage timer plan and inspection checkpoints
- Before/after result notes and batch lineage
- Searchable 110-plate offline field guide
- Local PDF tumble card
- No account, ads, analytics, tracking, subscription, or network requirement

Results depend on your entries and equipment. Confirm material compatibility, safe handling, wastewater rules, and current tumbler guidance before each run.


## Version history (last 1 release)

### 1.0 — 2026-07-22

No release notes.

## More apps by Robert Corbin

- [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266)
- [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175)
- [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447)
- [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025)
- [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719)
- [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879)

All apps by Robert Corbin: https://appshunter.io/developer/1890247992

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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 2026-08-10.*