# Nurunuru Checker — Test 120Hz ProMotion displays

> Test 120Hz ProMotion displays (iPhone/iPad app by 3810 Production.)

- Source: https://appshunter.io/ios/app/nurunuru-checker/id6815909918 (this page in markdown: same URL + `.md`)
- Developer: [3810 Production](https://appshunter.io/developer/6815889875)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 19 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China)
- Released: 2026-09-30
- Data updated: 2026-10-06

## What is Nurunuru Checker?

Is your iPhone or iPad really displaying smoothly?

Even on a "ProMotion 120Hz" display, the screen does not always run at its top speed. Nurunuru Checker shows your device's actual refresh rate and rendering, measured on the device itself.

■ Free
- Live FPS / refresh rate measurement
  See the frame rate actually shown on screen, with average, minimum and maximum FPS, frame time and jank count.

■ Premium features (unlock everything for 24 hours by watching one ad, or permanently with a one-time purchase)
- ProMotion Min/Max Test
  Ask the display for its highest and lowest refresh rates and compare the smoothness with a moving bar.
- Motion Blur & Response Test
  Check motion blur (ghosting) and response with moving objects.
- Sustained & Throttling Test
  Graph FPS over time to see performance drops caused by heat (throttling).
- Full-screen Check Patterns
  Find dead pixels and uneven colors with solid colors, gradients and grids.
- Bonus: Hoshimori Rinka Wallpaper
  Save a wallpaper of Hoshimori Rinka from 3810 Production's Information Management Dept. to Photos.

■ Rinka Mode
Choose "Rinka Mode" in Settings to recolor the whole app in Rinka's colors and show her illustrations across the screens.

■ Recommended for
- People using a ProMotion iPhone or iPad Pro
- Checking the display of a new or used device
- Anyone who wants to see their device's smoothness in numbers and with their own eyes

■ Pricing
Free to use. Some features are unlocked for 24 hours by watching one ad.
The one-time in-app purchase "Unlock All Features" unlocks everything permanently and removes ads. On a new device, use "Restore purchase".

Privacy policy: https://3810.pro/privacy-policy/nurunuru-checker
Contact: https://3810.pro/contact

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock All Features | $1.99 | one-time |



## Version history (last 2 releases)

### 1.10.0 — 2026-10-05

v1.10.0
・In the EEA, the UK and Switzerland, the app now asks for your consent before showing ads.
・In these regions, you can change your ad privacy settings from Settings.

### 1.9.0 — 2026-09-30

No release notes.

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## More apps by 3810 Production

- [Dashi Dashboard](https://appshunter.io/ios/app/dashi-dashboard/id6815889873)
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All apps by 3810 Production: https://appshunter.io/developer/6815889875

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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 2026-10-06.*