Sumalo vs The Operator
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sumalo
Engage in a fast-paced mental math challenge using the reduced sum technique. Test your reflexes across eight unique game modes and compete in seasonal rankings to improve focus and calculation speed.
- Reduced sum technique
- Eight unique game modes
- Seasonal rankings and ELO system
- Real-time duels with friends
- Detailed performance statistics
- Cognitive training for focus and memory
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Test your mental math skills and compete against other players in fast-paced challenges. Sumalo is a competitive mental math game built around speed, accuracy, and strategy, with online duels, multiple game modes, leagues, seasons, rankings, achievements, and rewards. The rules are easy to learn and hard to master: solve each operation and reduce the result to a single digit from 1 to 9. For example: 8 + 7 = 15 → 1 + 5 = 6. The faster and more accurate you are, the more points you earn. MENTAL MATH DUELS Challenge your friends or find an opponent in asynchronous matches. Each player can complete the duel at their own pace while both face the same challenge. Win matches, increase your ELO rating, and climb the global rankings. GAME MODES • Classic: speed and accuracy in the original Sumalo experience. • Beat the Clock: earn the highest score before time runs out. • Guess the number: find the missing number in the operation. • Scale: compare both sides and choose the correct answer. • Chain: solve sequences where each result depends on the previous one. • Outsider: find the false result or the only correct one. • Survival: protect your three lives and go as far as you can. • Mission: reach the target score before time runs out. LEAGUES, SEASONS, AND PROGRESSION • Move up through the leagues and fight for the top positions. • Take part in seasons with different modes and objectives. • Review your accuracy, response time, and winning streak statistics. • Compete in the global rankings and prove your skill. ACHIEVEMENTS AND REWARDS Complete challenges to unlock achievements, badges, and trophies. Earn coins through victories and progression, visit the in-game store, and expand your inventory with new items. WHY PLAY SUMALO? • Quick matches designed to play at any time. • Duels against friends and other players. • Varied modes for practicing mental math, logic, and focus. • Competitive progression with ELO, leagues, seasons, and rankings. • Achievements, statistics, rewards, and inventory. • A different take on math games and number puzzles. Sumalo is made for players who enjoy numbers, brain challenges, and competition. Learn the digital root mechanic, beat your best scores, and conquer every season.
The Operator
Step into the role of an Operator for the FDI, solving complex cases like murders and cyber attacks. Utilize advanced software to analyze evidence, assist field agents, and uncover the truth behind mind-bending mysteries. Your ingenuity is key to bringing criminals to justice and making the world a safer place.
- Investigate diverse criminal cases
- Utilize cutting-edge FDI software
- Analyze evidence and find clues
- Assist field agents with fact-checking
- Uncover mind-bending stories
- Solve mysteries through deduction
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[ TRY BEFORE YOU BUY ] Welcome to the FDI, Mr Tanner. Time to clear your head, work through your hangover and start your first day as an Operator. There are plenty of cases to solve. Assist our field agents using your computer console and ingenuity to bring criminals to justice. Ready to make the world a better place? Investigate Crimes: Solve cases such as murders, missing people, and cyber attacks. Use FDI Software: Analyze evidence and find clues using cutting-edge tools. Dig Deeper: Follow the evidence as it twists and turns, no matter where it leads. Uncover the Truth: Each case is a mind-bending story to unravel, so take notes. Assist Our Field Agents When our field agents need support, they'll call you. Help them by fact-checking, searching databases, identifying killers, and more. Each case will have evidence to evaluate, and it's your job to dig into documents, connect the clues, and solve the mysteries. Cutting-Edge Software You have the finest FDI software to help with those challenging cases. Tap through the Video and Photo Analyzer, Citizen and Vehicle Database, ChemScan, Notepad and a fully functional Terminal at any point to find out what you need. In Truth, We Seek To find the truth, you must follow the evidence and see where it leads, no matter how unsettling. But don't poke into unauthorized areas without first notifying your superiors. FDI's Most Wanted WARNING: Any new information on the cyber criminal known as HAL should be reported to your supervisor immediately. For the safety of the general public and your fellow agents, please keep all evidence confidential. ///// TRUST NO ONE ///// [End Transmission]
Screenshots
Verdict
The clearest difference is in-app purchases: Sumalo at none against The Operator's 1. Sumalo also leads on review sentiment (100% vs 84%). The Operator's advantage is ratings volume (510 vs 1). On price, rating, update cadence and ads 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
Both are free to download. The Operator sells 1 one-off in-app purchase. Sumalo asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Sumalo against 4.9 for The Operator. That said, the two scores are not equally well evidenced: The Operator has 510 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 100% of Sumalo's written reviews are positive against 84% of The Operator's.
Sumalo ships an update weekly, The Operator daily. The most recent releases landed on October 19, 2026 and October 17, 2026 respectively.
| Parameter | Sumalo | The Operator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.9 (510 ratings) |
| Positive reviews | 100.0% of reviews — better | 83.7% of reviews |
| Number of ratings | 1 | 510 — better |
| Update frequency | Weekly | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 125 MB | 926 MB |
| Age rating | 4+ | 12+ |
| Developer | Daniel Salamanca Garcia | Bureau 81 |
Customer experience
Sumalo
The Operator
In-app purchases
Sumalo
No in-app purchases
The Operator
- Full Game$7.99









