Modified versions of version 8.6.0.830 typically promised users the following "Premium" benefits for free:

The popularity of music streaming has skyrocketed, but the limitations of free accounts often frustrate listeners. This has led many to search for the Spotify V8.6.0.830 Mod.apk, a modified version of the world’s most popular music app designed to unlock premium features without a subscription.

: Bypasses the 6-skip-per-hour limit found in the official free version. On-Demand Playback

First, let’s decode the name. A standard APK (Android Package Kit) is the file format Android uses to distribute and install apps. A "Mod" or "Modded APK" is an altered version of the original application. Developers (often anonymous groups of reverse engineers) take the official Spotify code, decompile it, tweak the logic, and recompile it to unlock features that are normally behind a paywall.

Spotify V 8.6.0.830 Build 69736114 Mod Arm 64 V 8a - Internet Archive