Arms
Lift a Cube arms guide: every arm tier compared by price and push-up speed, plus which upgrades are worth buying and which ones to skip entirely.
Introduction
Arms are the speed stat of Lift a Cube. Every arm tier you buy increases your push-up rate, and push-up rate compounds directly into Strength per minute, which makes arms the deterministic half of your progression while chest materials are the lucky half. This page covers how the arm shop works, the order upgrades make sense in, the price-versus-throughput math you should run before buying, and which tiers are worth skipping on the way to the late game. Because arm prices and speed values are community-observed rather than officially published, we describe tiers by relative throughput instead of inventing exact numbers.
Arm Tier Throughput
| Arm Tier | Cost Band | Speed Gain | Buy or Skip |
|---|---|---|---|
| Starter arm | Low | Base rate | Buy immediately |
| Early tier | Low to mid | Small bump | Buy if the rate visibly changes |
| Mid tier | Mid | Noticeable | Buy after comparing with the next tier |
| Late tier | High | Large | Buy once multipliers carry you |
| Endgame tier | Very high | Highest confirmed | Save for it, do not impulse buy |
Arm Tiers
Starter arm
Cheapest tier and the first thing to buy
Early arm tier
A small but cheap speed bump
Mid arm tier
The middle of the throughput curve
Late arm tier
Large speed at a high price
Endgame arm tier
The highest confirmed push-up rate
Core Mechanics
The arm shop is a throughput curve rather than a checklist. Each tier costs more than the last and adds a larger push-up speed increase, so the real question is never whether a more expensive arm is better but whether the speed it adds justifies the coins right now. Early tiers are cheap and pay back quickly, which is why they are worth buying as soon as they change your rate. Late tiers only make sense once a material multiplier is doing the heavy lifting, because at that point the arm speed is multiplying a much larger Strength number. Community-reported prices suggest the curve steepens sharply toward the endgame.
Advantages
Understanding arms stops you from wasting the most common resource in the game. Because an arm tier is a pure speed upgrade with no randomness, a correct purchase raises your Strength per minute immediately and permanently, which shortens every future grind. Comparing tiers by speed gained per coin spent also reveals which mid-tier arms are traps and which cheap tiers are free wins. Once you know the curve, you can time purchases around chest rolls instead of buying blindly after every session. Arms also stack with train speed upgrades, so a well-chosen tier keeps paying off through every training method you unlock later.
Challenges
Exact arm prices and speed values are not officially published by the developer, so every comparison on this page is community-observed and may drift after a balance pass. The shop also offers no refunds, which means a wrong purchase permanently locks that coin into a tier you may outgrow quickly. Because the multiplier layer can suddenly make cheap arms irrelevant, advice that is correct before a lucky roll can become outdated the moment a rare material lands, so treat rankings as a snapshot and re-check them after each update. New players should also be careful not to over-invest in cosmetic arm variants that do not change push-up speed.
Frequently Asked Questions
Which arm should I buy first?+
Are expensive arms worth it?+
Should I skip any arm tiers?+
Quick Tips
Run the math before every purchase: divide the speed gain by the cost and compare it with the next tier up. A cheap tier that adds a small but real speed bump often beats an expensive tier that adds a similar amount. Re-run this comparison after each chest roll, because a new multiplier can change which tier is the best value.
Do not buy an arm just because it is affordable. The shop tempts players into spending on every tier in order, but the goal is throughput, not ownership. If a tier does not move your push-up rate enough to notice, keep the coins and put them toward training or the next meaningful tier instead.
Pair every arm purchase with a training plan. Arms raise push-up speed, but that speed only becomes Strength if you are actually training, so buy upgrades when you are about to sit in a long session rather than right before you log off. That way the new tier pays back during the hours you are online.
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