AppSaaz: GST Invoice India vs Instagst ‑ GST Reports India
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 3, 2026 for AppSaaz, Oct 26, 2026 for Instagst.
The short answer
- Both list a free plan. Paid plans start at $9.99/month for AppSaaz and $5.99/month for Instagst.
- AppSaaz lists 11 features Instagst’s listing doesn’t mention, including Branding, Bulk download, Credit notes.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
- · 100 free documents every month
- · A GST invoice for every order
- · CGST+SGST or IGST worked out per order
- · Credit and debit notes, automatically
- · Delivery notes and 4x6 shipping labels
- · Estimates, challans and vouchers
Pro
- · Buyer GSTINs checked on the GST portal
- · Everything in Free, unlimited documents
- · GST calendar and due-date reminders
- · GSTR-1, IFF, GSTR-3B and GSTR-9 files
- · Invoices emailed from your own domain
- · Ten invoice layouts to choose from
Scale
- · Auditor access without a Shopify login
- · Everything in Pro
- · File your GSTR-1 from inside Shopify
- · Unlimited GST portal calls
Free
- · Auto IGST / CGST-SGST based on address
- · Create your own template
- · Manage your products tax information
- · Up to 50 orders per month
Startup
- · 300 orders per month
- · Bulk print invoices
- · GST Report (first 300 orders per report)
Business
- · 2,500 orders per month
- · Advanced email automation
- · Auto collect GST number
- · B2B customer setup
- · GST Report (first 2,500 orders per repor
- · Integrations
Advanced
- · GST Report (Unlimited orders)
- · POS print
- · Priority WhatsApp & call support
- · Unlimited orders
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureIndian merchants must issue a tax invoice for every sale, with the CGST+SGST versus IGST split decided by where goods ship from and ship to. This app does that as orders arrive, working the tax out itself rather than copying Shopify's tax lines. A GST invoice cannot legally be changed once issued, so refunds raise credit notes and order edits raise debit notes.
Filing GST every month means rebuilding GSTR-1 and GSTR-3B from Shopify exports by hand — hours of spreadsheet work, and one wrong tax split away from a notice. Catalyst turns each order into a GST-compliant tax invoice with HSN codes and the correct CGST, SGST or IGST split based on place of supply. Each tax period becomes a filing-ready GST report you can download or auto-email to your accountant.
- Tax invoice for every order, with CGST+SGST or IGST worked out per order
- Credit and debit notes raised automatically on refunds, cancellations, edits
- GSTR-1 and GSTR-3B filing exports, plus a full working pack for your accountant
- Sequential, no-gap document numbering in your own financial-year format
- Search your orders and print
- Manage your products tax information
- Create your own template
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  AppSaaz |  Instagst |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | AppSaaz | Instagst |
|---|---|---|
| App Store rating | 5.0 ★ | Not published |
| App Store reviews | 5 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
AppSaaz and Instagst: common questions
- Is AppSaaz or Instagst cheaper?
- Both list a free plan. Paid plans start at $9.99/month for AppSaaz and $5.99/month for Instagst. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- AppSaaz lists 11 the others don’t mention, such as Branding, Bulk download, Credit notes, Data security. Instagst lists 1 the others don’t mention, such as Multi-currency. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 3, 2026 for AppSaaz, Oct 26, 2026 for Instagst; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 3, 2026 for AppSaaz, Oct 26, 2026 for Instagst. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.