Pick a cheaper zk Layer 2 by running through this quick checklist:

Is Ethereum gas currently low or moderate?
If L1 gas is spiking, most zk L2s that post data to Ethereum will be more expensive.
How big are typical fees for simple transfers?
Compare the cost of sending a basic token transfer across a few zk L2s at the same time.
What data availability model does the L2 use?
L2s that put all data on Ethereum tend to be more secure but slightly pricier than those using cheaper DA layers.
How complex is the transaction you plan to do?
A single transfer or swap on an optimized DEX is cheaper than a multi-step DeFi strategy with several contract calls.
What token are you paying fees in, and is there a subsidy?
If fees are paid in a volatile L2 token or boosted by temporary discounts, check the real cost in dollars and whether the discount is lasting.

Confidence: High.