# SASI

Source: watchfor.tools, an independent directory for people who build Shopify apps. No paid placement, no affiliate links. Not affiliated with Shopify.
Canonical: https://watchfor.tools/tools/sasi

Category: App Store ASO (https://watchfor.tools/categories/aso)
Summary: Mantle's free App Store index, with listing history and change alerts.
Price: Free
Free plan: yes
Owner: acquired by Mantle (https://watchfor.tools/owners/mantle)
Also from Mantle: the Mantle listing (https://watchfor.tools/tools/mantle)
Editor use: Editor uses this
Launched: unknown, not published on its own site
Community rating: 5 from 2 counted reviews
Website: https://sasi.heymantle.com
Entry last checked: 23 October 2026

## Description

A free index of the Shopify App Store, run by Mantle. It keeps historical listing data, lets you follow apps and keywords, and notifies you about the changes you choose. Mantle acquired it from Union Works, along with the separate App Store Analytics. The two are often described as one product.

## Watch for

Run by Mantle, whose billing platform is winding down. SASI's own site says nothing about its future, and it was being updated on 23 October 2026. It is free, with no plan or terms that say how long that lasts. Do not make it the only copy of data you depend on.

## Details

- Keywords tracked: Unknown
- Apps per plan: Unknown
- Competitor alerts: Yes
- Listing audit: Unknown
- API: No
- Integrations: None stated

From the vendor's own site, confirmed 2026-10-16. Unknown means the site does not say.

## Compared in

- Fifteen Shopify App Store ASO tools, compared by someone who sells none of them (https://watchfor.tools/blog/shopify-app-store-aso-tools-compared)

## Compare

- All alternatives to SASI: https://watchfor.tools/alternatives/sasi
- SASI against Applora: https://watchfor.tools/compare/applora-vs-sasi
- SASI against AppNavigator: https://watchfor.tools/compare/appnavigator-vs-sasi
- SASI against AppJubilee: https://watchfor.tools/compare/appjubilee-vs-sasi
- SASI against AppstorePulse: https://watchfor.tools/compare/appstorepulse-vs-sasi
- SASI against Becketto Rank Tracker: https://watchfor.tools/compare/becketto-vs-sasi
- SASI against BestAppify: https://watchfor.tools/compare/bestappify-vs-sasi
- SASI against LetsMetrix: https://watchfor.tools/compare/letsmetrix-vs-sasi
- SASI against Rankbase: https://watchfor.tools/compare/rankbase-vs-sasi
- SASI against Ranksy: https://watchfor.tools/compare/ranksy-vs-sasi
- SASI against SAMI: https://watchfor.tools/compare/sasi-vs-tracksami

## Related tools

- AppNavigator (App Store ASO, named as a direct competitor): Public index with ranking history, no account needed. https://watchfor.tools/tools/appnavigator
- Applora (App Store data, named as a direct competitor): The whole App Store as a live database, free on the web and over MCP. https://watchfor.tools/tools/applora
- Mantle (Analytics & billing, same owner): Billing, analytics, email, affiliates, flows, help desk. Shutting down. https://watchfor.tools/tools/mantle
- AppJubilee (App Store ASO): Multi-app ASO with automatic keyword discovery. https://watchfor.tools/tools/appjubilee
- AppstorePulse (App Store ASO): Rankings, competitor alerts and real MRR in one place. https://watchfor.tools/tools/appstorepulse
- SAMI (App Store ASO): Look up an app and see the keywords it already ranks for. https://watchfor.tools/tools/tracksami
- BestAppify (App Store ASO): The App Store data your agent can act on, not just read. https://watchfor.tools/tools/bestappify
- LetsMetrix (App Store ASO): Category rankings and collections, with a free plan. https://watchfor.tools/tools/letsmetrix