Comparison

A.C.E vs Stockfish AI Chess

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head

Ali's Chess Engine

Play, Learn, Analyze, Have Fun

Free

🎮 Games

★ 5.018 ratingsView app →

About

A.C.E

Features

Read full description

This home grown chess engine is rated ~1500ELO and is much more realistic than a chess . com bot! Test your skills and see if you can win!

About

Stockfish AI Chess

Play, learn, and analyze chess games offline with powerful AI engines. Offers 19 difficulty levels, a Chess Coach for feedback, and game review to study mistakes. Supports PGN import/export and FEN positions.

Highlights

Offline AI chess play
19 difficulty levels
Chess Coach feedback
Game review and analysis
PGN/FEN support
Board photo to position

Features

Read full description

Play chess, analyze your games and practice on iPhone and iPad with Stockfish 19 and 10 engines running on your device. Choose among 19 difficulty levels in Stockfish, explore openings, or arrange engine matches and tournaments. Enable the optional Chess Coach for feedback on your moves. Use Game Review to study mistakes and suggested continuations. Evaluations are engine estimates, not official player ratings. Turn a board photo into a position for analysis; check and correct the recognized pieces. Physical-board recognition is experimental. Save, import and export PGN games, and copy FEN positions. Play, analysis, coaching and photo processing work offline without uploading games or photos. Public-game imports and optional endgame database downloads require internet access. Independently developed by Tughan Y. Karsli. Not an official app of the Stockfish project.

Screenshots

A.C.E4 screens

Stockfish AI Chess4 screens

Verdict

The call

The clearest difference is update cadence: Stockfish AI Chess at daily against A.C.E's weekly. A.C.E's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

A.C.E ships an update weekly, Stockfish AI Chess daily. The most recent releases landed on November 4, 2026 and November 6, 2026 respectively.

Scorecard2 real differences · 8 level

A.C.E versus Stockfish AI Chess: the parameters behind the verdict, then further details
Parameter	A.C.E	Stockfish AI Chess
Price	Free	Free
Rating	—	5.0 (18 ratings) — better
Positive reviews	—	100.0% of reviews
Number of ratings	—	18 — better
Update frequency	Weekly	Daily — better
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	15.0 — better	17.0
Further details — not scored
Size	20 MB	943 MB
Age rating	4+	4+
Developer	Alastair McNeill	Tughan Yusuf Karsli

In-app purchases

None

A.C.E

No in-app purchases

None

Stockfish AI Chess

No in-app purchases

Questions

Is A.C.E free?

A.C.E is free to download, with no in-app purchases.

Is Stockfish AI Chess free?

Stockfish AI Chess is free to download, with no in-app purchases.

Do A.C.E or Stockfish AI Chess have ads?

Neither A.C.E nor Stockfish AI Chess shows ads.

Which is updated more often, A.C.E or Stockfish AI Chess?

A.C.E ships an update weekly, and Stockfish AI Chess daily. Most recently, A.C.E was updated on November 4, 2026 and Stockfish AI Chess on November 6, 2026.