So, Hiarcs has my recommendation as worth looking into, … and I am NOT paid to say this. It doesn't make any sense that Stockfish 13 has a higher NPS count almost twice the NPS count of Stockfish 14.1 which leads to it winning 2 out of 10 games with 7 draws. I should add that the developer has been quite responsive to my questions, queries and comments. When I just want to play, any of the three are fine and comparably capable.
While I also have Stockfish and Shredder, I spend 95%+ of my computer chess time with Hiarcs. I also use the iPAD OS version similarly. I use Hiarcs on my Mac to play against (~1600), but mostly to play through games in books, to play through games in PGN files, to create my own PGN collections, including adding annotations and variations. The interface is an example of a 'flatten' design. You can also control the internal engine parameters. You can review your game with comments, or study how Stockfish thinks, or track your progress.
Its full of nice touches: when you click or drag a piece, its. Stockfish has a gorgeous board that looks fantastic on Retina Displays. Stockfish will tell you whos winning and calculate the best move.
Play two-player games on the beautiful chess board, or get instant accurate analysis of any game. SmallFish offers you three distinct ways to improve your game. Stockfish is a powerful chess analysis app. The program says it can offer play levels from 750-3200 ELO for the computer version, so enough breadth to accommodate pretty much anyone. The strongest chess app is free, something very hard to believe but its true.
The only “tinkering” involves learning how to use the many features. (latest iPadOS versions if Nov 2020, last macOS version is Oct 2020). Under players, select Human Being and pick a rival and start the game. Hiarcs is alive and well, and does not need tinkering. To put this analyser to work, press Game in the menu, then New Game and then choose one of the options. XBoard with PolyGlot, eboard, Arena, Sigma Chess, Shredder, Chess Partner, or Fritz) in order to be used comfortably. It is not a complete chess program and requires some UCI-compatible GUI (e.g. HIARCS has been abandoned years ago, AFAIK. Stockfish is a free UCI chess engine derived from Glaurung 2.1.