A low poly illustration of a covered bridge crossing a glowing waterfall at dusk
Packsaddle Software LLC · North Carolina

Built to carry the load.

An independent software studio. We build small, sturdy tools that quietly do one job well, for Shopify merchants, site owners, developers and anyone who likes a good story.

11products in the shed
4Shopify apps
7live and usable today
1studio behind every one
For Shopify merchants

Shopify apps

Four apps for the parts of running a store that Shopify leaves to you: getting paid, keeping listings honest, and giving customers a reason to come back.

DueFox accounts receivable aging report
Live on the Shopify App Store

DueFox

Shopify · B2B

Net terms for wholesale. Approve buyers, send net 15, 30 or 60 invoices, chase late payers automatically, and see who owes what.

Net termsInvoicesAging report
Learn more →
In Shopify review

Photo Guard

Shopify · Catalog

Scans your product images and flags the ones that look AI generated or misleading, before a customer notices or a marketplace does.

AI image detectionUnlimited scans
Learn more →
OneWord customer cards: Moonlit, Bold, Devoted, Curious, Tireless
In Shopify review

OneWord

Shopify · Loyalty

Gives every repeat customer a personal card that sums up their year with your store in one word. Written from their real orders and made to share.

AI written cardsShareableFree plan
Visit the OneWord site →
Dropflock price tracker: 14 bought so far, 11 more and it drops to $54
Coming soon

Dropflock

Shopify · Pricing

Group buying that never makes anyone wait. Shoppers pay full price today, the price drops as more people buy, and earlier buyers get the difference back.

Group pricingStore creditShare links
Visit the Dropflock site →
Listings, privacy and help

Shopify app links

Packsaddle Software LLC is an independent studio in North Carolina. Questions about any Shopify app go to [email protected], and the same small team that built it answers.

For developers and site owners

Tools and APIs

Quiet infrastructure. Monitoring, moderation and paperwork help that runs in the background so you don't have to.

PulseChecker
Live

PulseChecker

Web · Monitoring

Uptime, cron job and AI agent monitoring. Know the moment a site goes down or a scheduled job quietly stops running.

UptimeCron heartbeatsFree for 10 monitors
Visit pulsechecker.dev →
Live

Catfish Wrangler

WordPress plugin

Flags AI generated images and scam pattern text in WordPress comments, reviews and media uploads, right inside wp admin.

CommentsReviewsMedia
Get it on WordPress.org →
Live

Content Guard API

REST API

The engine behind Catfish Wrangler, available to any app over HTTP. Send text or images, get back a suspicion level.

REST$0.01 per analysis
Get an API key →
PermitFix upload page
Live

PermitFix

Web · Construction

Upload a building permit rejection letter and get each correction explained in plain English, a drafted response, and the deadline.

Plain EnglishDraft responseFree
Try PermitFix →
For everyone else

Games, stories and everyday apps

The fun end of the shed. A mystery series you steer, a language game that rewards showing up, and a smarter way to pick dinner.

Dead Air: a radio host at the mixing desk late at night
Live

Dead Air

Interactive series

A vertical mystery from a small town radio station at 1:12 AM. Watch the episodes, then choose where Ray looks and who he names on air.

2 episodesChoose your pathFree
Watch Episode 1 →
StreakLingo start screen with the parrot mascot
Demo live

StreakLingo

Game · TikTok Mini

A language learning streak game for English speakers learning Spanish, Korean or Japanese. Short daily lessons, a streak worth protecting.

SpanishKoreanJapanese
Play the web demo →
TopBite: real reviews, ranked picks, any restaurant
Coming soon

TopBite

iOS · Android

Never guess the menu again. Type a restaurant's name and TopBite reads its recent reviews to tell you exactly what to order.

Real reviewsRanked dishes
Learn more →
Principles

How we build

Narrow scope

Every product solves one real problem. No platforms, no roadmap bloat. Just the thing that was missing.

Fails safe

When a tool isn't sure, it flags and gets out of the way. Nothing blocks a real person until it has earned that trust.

Runs on its own

Each product ships as its own service with its own billing. If one goes away, nothing else in the shed notices.

Questions, support or a bug to report?

Every app is built and supported by the same small team. Write to us and a real person answers.

Contact us