Lift a Cube How to Buy Arms

Buying arms is the most direct way to increase your push-up speed in Lift a Cube. But the arm shop has dozens of options, and spending Cash on the wrong arm at the wrong time can set your progression back by hours. This guide covers how the shop works, which arms to buy at each stage, and how to know when to upgrade.

Accessing the arm shop

The arm shop is located near the spawn area. Look for a gear icon or a mannequin displaying arms. Opening the shop shows all available arm tiers with their costs and speed bonuses. The interface displays each arm’s stat multiplier, price, and any special properties.

You can also access arms through the main menu under the Shop tab. This is useful when you are far from the spawn area and need to check prices or compare options.

Video guide

Understanding arm stats

Each arm has a base speed multiplier that determines how fast you perform push-ups. This multiplier is separate from and multiplied with arm material bonuses. Understanding this distinction is crucial for making informed purchasing decisions.

The arm shop displays the following information for each arm:

• Name — the arm’s designation and appearance
• Tier — the rarity tier (Common through Mythic)
• Speed multiplier — the base push-up speed boost provided
• Price — the Cash cost to purchase

Some arms have cosmetic variants that look different but provide identical stats. These variants cost more for the same performance and should generally be avoided unless appearance is your primary concern.

Arm tiers and unlocks

Arms are organized into tiers. New tiers unlock as you progress:

• Tier 1 (Common): Available from spawn
• Tier 2 (Uncommon): Available at 1,000 Strength
• Tier 3 (Rare): Available at 10,000 Strength
• Tier 4 (Epic): Available at 100,000 Strength
• Tier 5 (Legendary): Available at 1,000,000 Strength
• Tier 6 (Mythic): Available at 10,000,000 Strength

Some tiers have multiple variants with slightly different stat profiles. The differences are minor — focus on the tier first, then pick the variant that fits your budget.

What to buy at each stage

Early game (0–5,000 Strength)

Buy: Tier 1 arms or the cheapest Tier 2 Why: You need a speed baseline before multipliers can help. The cheapest arm that is faster than your current arm is the correct choice. At this stage, your priority is establishing a foundation for future progression.

Mid game (5,000–100,000 Strength)

Buy: Tier 2–3 arms, whichever you can afford Why: This is the progression sweet spot. Each tier upgrade is noticeable and the price is manageable with normal Cash flow. Consider whether the upgrade cost represents good value relative to the speed increase.

Late game (100,000–1,000,000 Strength)

Buy: Tier 3–4 arms Why: You can afford more expensive arms and the speed difference between tiers becomes significant at high multiplier stacks. At this stage, your decisions have larger impacts on overall progression rate.

Endgame (1,000,000+ Strength)

Buy: Tier 5–6 when affordable Why: The final cubes require every bit of speed you can get. Prioritize the best arm you can afford. Consider whether the investment will pay for itself through increased Strength generation.

The arm upgrade decision

When you have enough Cash for a new arm, ask:

1. Is the speed increase worth the Cash?
2. Will this Cash be better spent on multipliers or training upgrades?
3. How many hours of grinding does this arm save me?

Rule of thumb: If an arm would take more than 5 hours of grinding to pay for itself through increased Speed, wait for a cheaper option.

Common mistakes

• Buying Tier 5 when you can barely afford it — you need that Cash for multipliers
• Ignoring Tier 2–3 arms — they are often the best value per Strength per hour
• Buying cosmetic variants — always prioritize speed stats over appearance
• Upgrading too frequently — each upgrade has a cost; frequent upgrades can slow progression

Related pages

• Best arms — specific arm recommendations
• Arm rarity — tier breakdown and stat ranges
• Arm multiplier — how materials stack with arm speed
• Chest guide — how to get rare materials for upgrades