Sum Circuit — Price, Features and Who Should Skip

Sum Circuit is a free puzzle game for iPhone and iPad from developer Sae Won Yang. You connect 2–4 neighbouring number tiles — never diagonally — to match a target sum, and a correct connection clears those tiles so the numbers above fall into place. It costs nothing to download, and the listing does not disclose any in-app purchases. If you like quiet, offline number puzzles and do not mind optional ads for hints, Sum Circuit is worth downloading now; if you want timers, leaderboards or live opponents, skip it.

• What it is: a tile-connecting number puzzle with a 30-stage Journey, a 365-puzzle Expedition, and daily and bonus circuits.
• What it costs: free to download, with optional rewarded ads for hints and for playing a bonus circuit early.
• What is confirmed: version 1.0.0, 4+ content rating, English, Japanese and Korean text, offline play with no account, released 2026-10-02.
• What is unclear: the listing does not disclose in-app purchases, and Sum Circuit has 0 ratings so far, so there is no user consensus to lean on.
• Who should skip: players who want competitive modes, online play, or a large puzzle library they can judge from existing player feedback.

What Sum Circuit is

Sum Circuit is a puzzle game in the Games and Puzzle genres, published by Sae Won Yang and available on the App Store for iPhone, iPad and iPod touch. The core loop is arithmetic and gravity: you select 2–4 neighbouring tiles whose values add up to the target sum, connect them, and those tiles clear. Because numbers above fall into the gaps, clearing a tile now can change what is available for the next target. You work through targets from left to right to light the circuit.

The listing describes three ways to play. The 30-stage Journey opens with a short interactive tutorial and then moves through multiple targets and different connection shapes. The 365-puzzle Expedition unlocks one circuit at a time, asks you to complete each sector, and saves your best star result for every puzzle. Daily and Bonus circuits give you a date-based puzzle, and completing the Daily Circuit unlocks its bonus for free.

Controls are deliberately plain: tap tiles and press Connect, or drag across them and release. Undo and restart are available when a route dead-ends. Modes, stage selection and game tools live in Settings rather than on the play screen, so the game screen stays focused. You can also repeat the tutorial without losing your current puzzle.

Key features

• Connect 2–4 neighbouring number tiles to match a target sum, with no diagonal connections allowed.
• Play a 30-stage Journey that starts with a short interactive tutorial and then mixes multiple targets and connection patterns.
• Work through a 365-puzzle Expedition that unlocks one circuit at a time and stores your best star result per puzzle.
• Solve date-based Daily and Bonus circuits, where finishing the Daily Circuit unlocks its bonus for free.
• Use tap-and-Connect or drag-and-release controls, plus Undo and Restart when you get stuck.
• Switch text and feedback between Korean, English and Japanese, with sound effects, haptics and optional background music that is off by default.

Who it is for and who should skip

Sum Circuit suits players who want a calm, offline number puzzle they can pick up in short sessions. Progress, completed-stage records and puzzle state are stored on your device, and no account is required, so it works on a commute or a flight. The 365-puzzle Expedition gives that kind of player a long, steady ladder to climb, and the saved best star result per puzzle gives a reason to return to a stage.

Skip Sum Circuit if you want a competitive puzzle game. The listing shows no leaderboards, no timers, no multiplayer and no online component beyond ad delivery. Skip it too if you need a large body of player opinion before spending time on a puzzle game: Sum Circuit carries a 0.0 out of 5 rating from 0 ratings, so there is no user consensus to check. Players who dislike ads in any form should also weigh the hint system carefully, even though the ads are optional.

Pricing and availability

Sum Circuit is free to download. The listing shows a price of Free and does not disclose any in-app purchases, so there is no published subscription, no published trial and no published upgrade price to report. If you want to know whether money can be spent inside Sum Circuit, the source material does not say — that is a gap, not a confirmation that the game is entirely monetisation-free.

The listing does describe how ads work. Watching ads is optional. Journey stages 1–2 have free hints, and every later puzzle includes free hints; after those are used, one optional rewarded ad unlocks the remaining hints for that puzzle. Completing the Daily Circuit unlocks its bonus for free, or you can choose an ad to play the bonus early. If a prepared ad is unavailable or cannot load, the requested feature opens for free. Ads require an internet connection, which is the one part of Sum Circuit that is not offline.

Availability is straightforward: Sum Circuit is released and downloadable now, with a release date of 2026-10-02 and a last-updated date of 2026-10-02. The current version is 1.0.0. The content rating is 4+, and the supported language list is English, Japanese and Korean. The supported device list is long and runs from older hardware such as iPhone 5s, iPad Air and iPod touch (6th generation) up to recent models including iPhone 17, iPhone Air and iPad Pro (M5).

What to expect

The listing suggests a puzzle game built around restraint rather than spectacle. There is no mention of a story, characters, level themes or progression systems beyond stages, sectors and star results, so the appeal rests on the sum-matching mechanic itself and on the order in which you clear tiles. Expect the difficulty to come from planning ahead: the listing warns that a tile you clear now might be needed for the next target, which points to puzzles that punish careless clearing rather than slow tapping.

Expect a small, quiet interface. Modes, stage selection and game tools are tucked into Settings to keep the game screen focused, and the tutorial can be replayed without losing your current puzzle. Feedback is configurable: Korean, English and Japanese text, sound effects, haptics, and background music that is off by default. Offline play with no account means progress lives on your device, so there is no cloud profile described in the listing.

Expect ads to be present but avoidable. Hints are free up to a point, then one optional rewarded ad covers the rest for that puzzle; the Daily Circuit bonus is free on completion, or available early via an ad. The listing also states that if a prepared ad is unavailable or cannot load, the requested feature opens for free. What you should not expect, based on the listing, is any confirmed roadmap, future update or additional platform.

FAQ

What kind of app is it?

Sum Circuit is a puzzle game for iPhone, iPad and iPod touch, listed under Games and Puzzle. You connect 2–4 neighbouring number tiles to match a target sum, with no diagonals, and cleared tiles let the numbers above fall into place. It includes a 30-stage Journey, a 365-puzzle Expedition, and daily and bonus circuits. Text and feedback are available in Korean, English and Japanese.

Is it free?

Sum Circuit is free to download, and the listing does not disclose any in-app purchases. Ads exist but are optional: Journey stages 1–2 have free hints and every later puzzle includes free hints, after which one optional rewarded ad unlocks the remaining hints for that puzzle. Completing the Daily Circuit unlocks its bonus for free, or you can watch an ad to play it early. Ads need an internet connection.

How do I pre-order it?

You cannot pre-order Sum Circuit, because it is already released and downloadable. The listing gives a release date of 2026-10-02 and a last-updated date of 2026-10-02, with version 1.0.0 currently available. Search for Sum Circuit on the App Store and download it directly; no reservation step is involved. The listing does not mention any pre-order bonus or launch offer.