# Vibrometer vs PriMemory™

The clearest difference is in-app purchases: Vibrometer at none against PriMemory™'s 6. PriMemory™'s advantage is update cadence (every 3 weeks vs every 21 months). On price, ads, monetization model and device support there is nothing between them.

Vibrometer costs $0.99 and PriMemory™ $0.99 up front. PriMemory™ sells 6 one-off in-app purchases. Vibrometer asks for nothing beyond the download.

Vibrometer ships an update every 21 months, PriMemory™ every 3 weeks. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Vibrometer | PriMemory™ |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/vibrometer/id353867884/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 6 MB | 84 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 12+ | 4+ |
| Developer | [Gianluca Natalini](https://appshunter.io/developer/348380792) | [TAPQUAD, INC](https://appshunter.io/developer/551904314) |

## What reviewers say

### Vibrometer

[App page](https://appshunter.io/ios/app/vibrometer/id353867884)

This game challenges players to remain as motionless as possible to win. It also functions as a tool to measure and record real-time vibrations, calculating energy consumed and acceleration data.

**Highlights:** Real-time vibration measurement, Energy consumption counter, Vibration recording, Multiplayer stillness challenges, Acceleration data charting, Save and email acceleration diagrams

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### PriMemory™

[App page](https://appshunter.io/ios/app/primemory/id1218557642)

This game challenges and trains your memory with sequences of colors and musical tones. Its AI adapts to your playstyle, offering unique challenges with each session. Improve your cognitive abilities and recall skills while enjoying engaging minimalist graphics and a unique soundtrack.

**Highlights:** Adaptive AI engine, Color and musical tone sequences, Progressive difficulty levels, Unique soundtrack, Minimalist graphics, Memory index tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| (3) PriMemory Retries | $0.99 | one-time |
| 620 Stars | $0.99 | one-time |
| (5) PriMemory Retries | $1.99 | one-time |
| 1230 Stars | $1.99 | one-time |
| (8) PriMemory Retries | $2.99 | one-time |
| 3230 Stars | $2.99 | one-time |


## Frequently asked questions

### Is Vibrometer free?

Vibrometer costs $0.99, with no in-app purchases.

### Is PriMemory™ free?

PriMemory™ costs $0.99, and also offers in-app purchases.

### Do Vibrometer or PriMemory™ have ads?

Neither Vibrometer nor PriMemory™ shows ads.

### Which is updated more often, Vibrometer or PriMemory™?

Vibrometer ships an update every 21 months, and PriMemory™ every 3 weeks. Most recently, Vibrometer was updated on October 9, 2026 and PriMemory™ on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*