Comparison

The Sum vs One Left

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

Head to head
About

The Sum

Features
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The Sum : Math And Puzzle is a simple yet challenging game where you swipe to move blocks and combine numbers to reach the correct sum. Each level invites you to think carefully, plan your moves, and solve satisfying math puzzles. Easy to learn but increasingly challenging, the game blends logic, arithmetic, and spatial thinking into smooth puzzle experience. How to Play - Swipe to move number blocks - Combine numbers to reach the target sum - Find the correct calculation to complete the level - Solve puzzles with strategy and logic Features - Simple swipe controls - Clean and relaxing puzzle design - Progressive difficulty - A calm experience for players who enjoy numbers and puzzles Wether you enjoy brain teaser or casual puzzle games, The Sum : Math And Puzzle offers a fun way to challenge your mind.

About

One Left

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One Left brings the timeless Peg Solitaire puzzle to your iPhone, iPad, and Mac with a beautiful modern design. THE CHALLENGE Start with 32 pegs and one empty space. Jump pegs over each other to eliminate them. Your goal: leave just ONE peg remaining - ideally in the center! FEATURES • Clean, intuitive interface designed for all ages • Universal app - play on iPhone, iPad, and Mac • Multiple color themes to personalize your board • Global leaderboard - compete for the fastest times • Helpful hints when you get stuck • Interactive tutorial for beginners • Track your statistics and improve your strategy • Haptic feedback for satisfying gameplay (iOS) • No ads interrupting your game PERFECT FOR • Puzzle lovers seeking a mental challenge • Quick brain training sessions • Relaxing gameplay without time pressure • Players who enjoy classic board games The Peg Solitaire puzzle has been enjoyed for centuries. Now experience it reimagined for the modern era. Can you solve it with just ONE LEFT?

Screenshots

The Sum4 screens
One Left4 screens

Verdict

The call

The clearest difference is ads: One Left at none against The Sum's shown. The Sum's advantage is iOS requirement (13.0 vs 17.6). On price, update cadence, 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

The Sum ships an update every 3 weeks, One Left monthly. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 4 level
The Sum versus One Left: the parameters behind the verdict, then further details
ParameterThe SumOne Left
PriceFreeFree
Update frequencyEvery 3 weeks — betterMonthly
AdsYesNo — better
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.0 — better17.6
Further details — not scored
Size144 MB14 MB
Age rating4+4+
DeveloperLIM SING CHYUANAlexandre Brotto Rangel da Silva

In-app purchases

None

The Sum

No in-app purchases

None

One Left

No in-app purchases

Questions

Is The Sum free?
The Sum is free to download, with no in-app purchases.
Is One Left free?
One Left is free to download, with no in-app purchases.
Do The Sum or One Left have ads?
The Sum shows ads; One Left does not.
Which is updated more often, The Sum or One Left?
The Sum ships an update every 3 weeks, and One Left monthly. Most recently, The Sum was updated on October 25, 2026 and One Left on October 28, 2026.

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