# primoz: Prime Number Puzzle — Drop. Sum. Detonate.

> Drop. Sum. Detonate. (iPhone/iPad app by Stefan Hillbrand.)

- Source: https://appshunter.io/ios/app/primoz-prime-number-puzzle/id6755624981 (this page in markdown: same URL + `.md`)
- Developer: [Stefan Hillbrand](https://appshunter.io/developer/1662267192)
- Category: Games, Puzzle
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 14.0.0 · 31 MB
- Languages: American English, German (Germany)
- Released: 2026-04-27
- Data updated: 2026-08-06
- User reviews in markdown: https://appshunter.io/ios/app/primoz-prime-number-puzzle/id6755624981/reviews.md

## What is primoz?

primoz gives you four numbers and one goal. The numbers are 2, 3, 5, and 7 — the single-digit primes. The goal is to land them into rows and columns whose sum is a multiple of ten. When that happens, the line clears and pays you its exact sum.

Primes fall one at a time onto a 6×8 grid. Swipe left or right to slide each one as it drops. Swipe down to commit. A row that adds to ten clears for 10 points. A row that adds to thirty clears for 30. Same for columns — the contiguous stack at the bottom of each column is checked every time a piece lands.

Four numbers isn't much. Until the grid is half full and you're racking your head for a 3 to complete a 17-stack. Then it's plenty.

COMBO STREAK SYSTEM
When a clear drops cells into a new sum, you get another clear — and the multiplier climbs. A 2nd consecutive clear pays ×2.5. A 3rd pays ×5. A 4th pays ×7.5. Five in a row hits ×10. Land a piece that clears nothing, and the streak snaps back to zero.

MULTI-CLEAR BONUSES
If a single piece completes more than one line at once — say a row and a column crossing through it — every point from that move is multiplied again:

2 lines at once: ×2

3 lines at once: ×3

4 lines at once: ×4

5 or more: matching multiplier

Stack a multi-clear onto a streak and the scoreboard gets loud.

ROUNDS
Round 1 asks for 250 points. Hit it and the whole board detonates at once, the target jumps by 50, and you go again. Round 2 wants 300. Round 10 wants 700. The grid keeps refilling, the target keeps climbing, and the room for error keeps shrinking.

Clear the whole board mid-round and you bank a flat +100 bonus on top.

THREE DIFFICULTY LEVELS
Every level raises the floor — a fresh row of primes pushes up from below, crowding you closer to game over.

Easy: Slow fall. Floor rises every 10 pieces.

Normal: Medium fall. Floor rises every 8 pieces.

Hard: Fast fall. Floor rises every 5 pieces.

FEATURES
◆ Cascade clears — a falling cell can land into a new sum and trigger another clear, all feeding the same streak 

◆ Haptics that match the moment — a tap for a small clear, a thump for a combo, a double-pulse for a round completion 

◆ Auto-save — close the app mid-round, reopen exactly where you left off 

HOW TO PLAY
A prime — 2, 3, 5, or 7 — falls from the top of the grid

Swipe ← → to slide it, swipe ↓ to drop fast

Land it so a row sums to a multiple of ten, or so the bottom column stack does

Cleared lines pay their sum; streaks and multi-clears multiply what you earn

Reach the round target to wipe the board and push deeper

Four numbers. One rule. Every drop either builds a ten or gets in the way of one. What round can you reach?

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |



## Version history (last 4 releases)

### 1.3 — 2026-07-31

Improved gesture handling.

### 1.2 — 2026-06-10

Fixed Banner Visibility.

### 1.1 — 2026-04-29

Added ads to keep the app free. Premium upgrade available to remove them.

### 1.0 — 2026-04-28

No release notes.

## More apps by Stefan Hillbrand

- [blockslidez: Slide Puzzle Game](https://appshunter.io/ios/app/blockslidez-slide-puzzle-game/id6755525834)
- [bloxed: 9x9 Block Puzzle](https://appshunter.io/ios/app/bloxed-9x9-block-puzzle/id6755620452)
- [spawnz: 9x9 Sector Puzzle](https://appshunter.io/ios/app/spawnz-9x9-sector-puzzle/id6755625079)
- [stacz: Falling Block Puzzle](https://appshunter.io/ios/app/stacz-falling-block-puzzle/id6755625330)

All apps by Stefan Hillbrand: https://appshunter.io/developer/1662267192

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-06.*