What is the best alternative to NiceHash on iPhone?

Pi Network, S tier, #1 in crypto mining.

Is there a free alternative to NiceHash?

Yes: Pi Network (S tier, #1) is free to download.

Yes. 2 apps rank above it in crypto mining: Pi Network (#1), COIN: Always Be Earning (#2).

NiceHash is A tier, #3 of 6 in crypto mining. Here is everything that competes with it on iPhone, in tier order.

1
Pi NetworkShigher tier
Free download · ★ 4.2 · 13,135 ratings · score 89
Wallet app for accessing and growing Pi holdings and hosting digital assets.
2
COIN: Always Be EarningA
Free + IAP · ★ 4.5 · 9,638 ratings · score 85
Free app that gamifies everyday activities such as driving and exercise with location-based games and rewards.
4
Bee Network:Phone-based AssetA
Free download · ★ 4.5 · 4,618 ratings · score 82
Free Utilities app describing a Web3 platform with BEE mining, asset management, mini-games, Dapps, and crypto news.
5
Nodle: Private wallet & AIB
Free download · ★ 4.6 · 4,077 ratings · score 80
Crypto wallet that turns your phone into a Nodle Network node to earn NODL, with swaps, sends and encrypted chat.
6
Ethereum Mining MonitorD
Free download · ★ 4.7 · 2,476 ratings · score 59
Remotely monitors multiple Ethereum mining rigs and supported mining pool accounts, and shows cryptocurrency market.

What is the best alternative to NiceHash on iPhone?: Pi Network, S tier, #1 in crypto mining.
Is there a free alternative to NiceHash?: Yes: Pi Network (S tier, #1) is free to download.
Does anything rank above NiceHash?: Yes. 2 apps rank above it in crypto mining: Pi Network (#1), COIN: Always Be Earning (#2).