Steal a Seed Treadmill Upgrades: How to Upgrade and What Changes
How to upgrade the treadmill in Steal a Seed: the shop upgrade interaction, observed cash costs and per-second training gains, and what changes for Speed training.
In Steal a Seed, the treadmill is upgradeable: buy a better treadmill at the treadmill shop for in-game cash, and each purchased tier immediately increases the displayed per-second gain while you train. The footage does not clearly label whether that figure represents Speed gain or cash generation. The full level sequence, complete cost list, and maximum upgrade cap are not currently documented, so rely on the price labels shown on your in-game upgrade offers rather than a fixed table.
Treadmill upgrades are officially part of the game loop
The official game description lists treadmill upgrades as a core mechanic alongside Speed training: players are told to "Upgrade your treadmill and unlock more planters" and to "Train on the treadmill to boost your Speed." This confirms the device can be changed by the player, but the description alone does not specify how upgrades are purchased, what they cost, or how many upgrade tiers exist.
How to upgrade the treadmill
Upgrades are made through in-game purchases at the treadmill shop. Gameplay footage shows each purchased tier announced with its new per-second gain — for example, "upgrade the treadmill. Plus 7.95 a second" and later "Upgrade treadmill plus 19.6 to a second." Costs scale steeply across tiers: the same playthrough shows a $3 billion treadmill purchase, with the following tier priced at 500 billion. These observed costs and gains may not reflect current prices or every tier, so check the cash cost and per-second gain on the upgrade offer you're shown in-game.
To upgrade: go to the treadmill shop, review the cash cost and the per-second gain listed for the next tier, and buy it once you can afford it. The new training rate applies immediately.
What changes after upgrading
Upgrading raises the treadmill's displayed per-second figure right away — gameplay footage shows the base treadmill at roughly +2–3 per second, rising to the observed +7.95 and +19.6 after upgrades. The footage does not clearly disambiguate that display's unit. Training on the upgraded treadmill coincides with a higher Speed stat: the same player reports reaching a million Speed after training while away, and 26–34 million Speed later in the session.
What the footage does not show is a controlled before-and-after Speed comparison under matched conditions, so the exact relationship between the per-second figure and Speed growth rate is inferred from training outcomes rather than measured. Treat per-second gains as a clear but unquantified training improvement.
Upgrade order and limits
No verified sequence of upgrade levels, maximum upgrade cap, or direct evidence that treadmill upgrades mechanically unlock planters is currently documented. The official description mentions upgrading the treadmill and unlocking more planters as separate phrases in the same feature list, which is not proof of a dependency. Higher-cost tiers do exist — a $3 billion purchase is shown, followed by a 500 billion tier — confirming scaling costs but not a full table. To plan upgrades, check each next-tier price in-game rather than assuming a pattern.
Next step: open the treadmill shop, note the cost and per-second gain of your next upgrade, buy it when affordable, and run a normal training session to see the new rate applied.