3D Bolt Master®: Screw Master®

Joymaster Puzzle Game Studio pitches 3D Bolt Master®: Screw Master® as a short mental break. It is a casual 3D puzzle in which detailed objects are held together by coloured screws, and the job is to take them apart in a sensible order.

Players rotate each model to find the screws fixing its parts in place, then sort each screw into the box that matches its colour. Early levels introduce the rules step by step, while later ones call for sharper observation and careful planning of which screw comes out first. The developer counts more than 10,000 levels with varied models, colours and layouts. Accessibility gets real attention: a colour-blind mode adds shapes and patterns to the screws and offers high-contrast palettes, switchable in settings. A card collection and events provide extra rewards.

The ratings are exceptional, with a 4.8 average from 474,300 ratings, 91% five stars and only 1% one star, and 10,000,000+ installs. The game is free and ad supported, though the developer describes optional rewarded ads as part of its approach. In-app purchases range from $0.99 to $99.99 per item. The latest update is from 2026-09-20, Android 7.0 or newer is required, and it is rated Everyone. We list 22 versions; the newest, 1.4.6, is 245.2 MB.

Puzzle fans who want an easy-going, bite-sized challenge, including colour-blind players, are well served here. Those with little free storage should account for the download size.