FactorMan vs iWorld US Lite
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FactorMan
A math game where players earn points by selecting numbers, while an opponent calculates the sum of their factors. Strategic number selection and arithmetic skills are key to winning, with options to play against AI or another human.
- Earn points by choosing numbers
- Opponent calculates sum of factors
- Strategic number selection
- Play against AI or human opponent
- Develop arithmetic skills
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This math game is played against the superhero FactorMan! You earn points by choosing numbers between 1 and 100. If you choose 5, you get 5 points; if you choose 18, you get 18 points. But FactorMan gets the sum of all of the factors of the number you have chosen (except for the number itself). If you choose 12, for example, you get 12 points, but FactorMan gets 1+2+3+4+6=16 points! Once a number has been used to gain points (by either you or FactorMan), it cannot be used again, and you may choose only numbers that have at least one other factor left on the board. To win you must have good arithmetic skills and develop a careful strategy. It is not as easy as it might sound! You can also play the game with a human opponent instead of FactorMan. This significantly changes the strategy needed to win.
iWorld US Lite
This app introduces U.S. states and capitals through interactive games and puzzles. It uses a Montessori-inspired approach with self-correcting activities to foster independent learning for young children. Printable worksheets are also available for offline reinforcement.
- Interactive state and capital introductions
- Quiz, puzzle, and labeling activities
- Montessori 3-part lesson method
- Self-correcting activities
- Student-controlled challenge levels
- Printable worksheets
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iWorldGeography is used by schools, libraries, and families in 74 countries!!!! This FREE TRIAL includes 7 states in a fully functional version of iWorldGeography United States. Give it a try! Includes: Maine, Georgia, Michigan, North Dakota, Oklahoma, Nevada, and Washington. "Your iWorld apps were the first we found that we could endorse whole-heartedly … Thank you for your quality, real, Montessori apps." -- montessoritech.net Just like the full version of iWorldGeography United States, US Lite includes a Montessori 3-part-lesson [introduce, recall, reconstruct], plus labeling. Student-centered, self-correcting, independent work blends seamlessly with existing curriculum or stands alone for home use. Free worksheets can be printed for follow-up, physical-world activities at home or in the classroom. Available to all at TenSunInteractive.com - Extras. This introduction to United States and Capitals was designed by former Lead Developer at MIT's Center for Educational Computing Initiatives. Created for 6-to-9 year olds. Narrated by a child. United States includes an introduction to state names and capitals plus quiz, puzzle, and label activities … Content: • Active Intro - Touch any state to hear its name. • Passive Intro - Movie introduces each state name. • Quiz - Name is played. Touch any state to reveal answer. • Puzzle - Freely drag pieces to reconstruct map. • Label - Pins drag freely to label states and capitals. Features: • Self-Correcting Activities • Student-Controlled Manipulatives - pins & pieces drag freely on screen • Fresh Challenge - randomized content appears in a new order each time Student-Managed Options: Puzzle • "Grid" - scatters pieces to screen edges. • "Toss" - scatters pieces randomly across screen. • "Lines/No Lines" - toggle to work with or without outline. Labels • "Pass" - skips current label. • "Lightbulb" - toggles to show or hide control map. • Control visual-background information: • --- "Label" - color background, pin shows label only • --- "Color" - outline background, pin shows color only • --- "Label & Color" - outline background, pin shows label & color Learning Style: • Independent work • Self-correcting activities • Challenge increases as activities progress • Options allow students to manage challenge level and visual style • Children control navigation; never locked into an activity • No penalty for wrong answer; correct answer simply reinforced • No distracting bells and whistles • Worksheets support transition back to physical world activities TenSun puts children in charge of their learning by allowing them to control the challenge level and depth of their lesson. Activities are self-correcting. Children are free to work independently, in a small group, or with the help of a supervising adult at home or in the classroom. ONLINE MAPS AND LABELS Touch Classroom Printouts button on app's Teacher & Parent screen to access printouts for additional color, trace, and label activities. Or, visit TenSunInteractive.com's Extras page. TWITTER NEWS Follow us on Twitter @tensuninteract for App, Update, and Online Extra alerts. FACEBOOK Follow TenSun Interactive on FaceBook. EDUCATION PRICING 50% discount for 20+ apps with Apple's Volume Discount Program for Education EDUCATIONAL NOTE iWorldGeography colors match American Montessori Society classroom materials. iWorldGeography Series blends self-correcting, child-directed-activity design with Geography curriculum used in Montessori Children's House and Lower Elementary classrooms. Concept and visual design is thoughtfully integrated to supplement existing curriculum and classroom materials. The series was inspired by 3-year's observation in Lexington (MA) Montessori School Children's House classrooms where MyWorld, TenSun's desktop-based version of this series, has been used since 2004.
Verdict
The clearest difference is rating: iWorld US Lite at 5.0 against FactorMan's 3.7. FactorMan's advantage is update cadence (every 7 months vs every 38 months) and iOS requirement (11.0 vs 26.4). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
iWorld US Lite holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 10 and 4 respectively.
FactorMan ships an update every 7 months, iWorld US Lite every 38 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | FactorMan | iWorld US Lite |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (10 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 10 — better | 4 |
| Update frequency | Every 7 months — better | Every 38 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPad |
| Requires iOS | 11.0 — better | 26.4 |
| Further details — not scored | ||
| Size | 18 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Bretl | Lynne Bolduc |
Customer experience
FactorMan
iWorld US Lite
In-app purchases
FactorMan
No in-app purchases
iWorld US Lite
No in-app purchases
Questions
Is FactorMan free?
Is iWorld US Lite free?
Which has better reviews, FactorMan or iWorld US Lite?
Do FactorMan or iWorld US Lite have ads?
Which is updated more often, FactorMan or iWorld US Lite?
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