Tetra vs PrimeFactorizationGame
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tetra
Create 3D models with intuitive point manipulation and surface editing tools. Publish your creations, share them with others, and export them for 3D printing or other applications. Offers symmetry, coloring, and layer management for detailed designs.
- Intuitive 3D shape creation
- Point and surface editing
- Color painting and erasing
- Symmetry tools
- STL and OBJ export
- iCloud syncing and sharing
- Layer management
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Tetra is a 3D modeling app that makes 3D works easily. Easily create 3D shapes By adding points or moving points, you can make a 3D shape as you wish. Publish artwork You can post and publish your finished artwork. Share artwork By exporting in STL format, OBJ format, you can use it with 3D printer or other 3D editing application. You can save it to iCloud and share it among devices. Main 3D editing functions · Add, delete, move, resize points · Flip the edge of the surfaces of 3D shape (Repartition of the two surfaces sandwiching the edge by the other diagonal line) · Paint color on the surface of 3D shape, erase it, pick it · Paint color on the floor, erase it, pick it · Show / hide, lock the floor. · Left-right symmetry, front-back symmetry · Guide · Capture and save images · Export in STL format (not applicable for iPhone 5, iPhone 5C, iPad 4th generation), OBJ format · Undoing / Redoing · Lock (editing prohibited) · Show / hide line (grid / wire frame) · Show / hide 3D shape (translucent with long press) · Light · Display the coordinates that you manipulated · Add, delete, duplicate, rename, move, rotate, flip horizontally, import layers Show / hide 3D shape, color, lock for each layer * Viewpoint operation · Rotate: Swipe with one finger · Zoom: Pinch with 2 fingers, or Swipe up and down with long press · Focus: Long press to menu selection · Front-rear / left-right movement: Swipe with 2 fingers · Up / down movement: Swipe with 3 fingers · Reset: Double tap with 2 fingers Main artwork edit function · Create, delete, duplicate, rename artworks · Move to, from iCloud · Export to file Main artwork public function · Upload, delete artworks · Browsing and downloading published artworks *Tetra is using the icons8.com icon. https://icons8.com
PrimeFactorizationGame
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Number meteors are coming! Break them apart with prime factorization! A brand-new brain training game that combines prime factorization with shooting action! Watch the number meteors falling from the sky, tap the correct prime number button, and fire your beam! Break down the numbers as fast as you can. The quicker you perform prime factorization, the faster the meteors shrink and eventually shatter! Train your calculation speed, mental math skills, and decision-making ability all at once. A full-fledged math and brain-training game that can be enjoyed by both kids and adults. [Features] ・Experience prime factorization like an action shooting game ・Quickly choose and destroy multiple falling meteors ・Difficulty levels from Beginner all the way to the super hard Oni mode ・Perfect for improving calculation skills, brain agility, and mental math ・Great for short brain-training sessions and math learning [Recommended for] ・Fans of math puzzles and number games ・Those who love brain training or calculation games ・Anyone who wants to improve their mental math speed ・Players who excel at fast-reaction games ・Parents looking for educational math games for kids Can your brain survive Oni mode? Aim to become the fastest prime factorization master!
Screenshots
Verdict
The clearest difference is update cadence: Tetra at fortnightly against PrimeFactorizationGame's monthly. Tetra also leads on iOS requirement (13.0 vs 17.6). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Tetra ships an update fortnightly, PrimeFactorizationGame monthly. The most recent releases landed on June 8, 2026 and September 10, 2026 respectively.
| Parameter | Tetra | PrimeFactorizationGame |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (51 ratings) — better | — |
| Positive reviews | 46.2% of reviews | — |
| Number of ratings | 51 — better | — |
| Update frequency | Fortnightly — better | Monthly |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 8 MB | 7 MB |
| Age rating | 12+ | 4+ |
| Developer | Shingo Isobe | TomatoAppLab |
In-app purchases
Tetra
No in-app purchases
PrimeFactorizationGame
No in-app purchases









