# ZenLevel — Precision bubble level & plumb

> Precision bubble level and inclinometer app with multiple measurement modes. (iPhone/iPad app by YANMIN WANG.)

- Source: https://appshunter.io/ios/app/zenlevel/id6762086055 (this page in markdown: same URL + `.md`)
- Developer: [YANMIN WANG](https://appshunter.io/developer/1867998387)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: American English
- Released: 2026-04-15
- Data updated: 2026-06-26
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/zenlevel/id6762086055/reviews.md

## What is ZenLevel?

ZenLevel turns your iPhone into a precision inclinometer with the calm, deliberate feel of a real
machinist's instrument. Built for builders, DIYers, photographers, woodworkers, and anyone who needs
something to be perfectly level, perfectly plumb, or precisely measured.

  FOUR MEASUREMENT MODES

  SURFACE — Lay your iPhone flat on a countertop, shelf, or picture frame. The two-axis bubble instrument
  shows the exact inclination, with individual digits that smoothly roll between values like a laboratory
  dial. When you find true level, the entire interface shifts to a calm, luminous green — the "zen moment" of
   perfect alignment.

  PLUMB — Press the back of your iPhone against any vertical surface to check if it's truly vertical. A tall
  bubble tube rises and falls based on how far the wall deviates from plumb. A "check hold" indicator warns
  you if your grip is too flat for an accurate reading.

  CALIBRATE — Every sensor drifts. Place your phone on a surface you trust to be flat, wait for the stability
   meter to reach 100%, and tap ZERO OUT. Your calibration offsets persist across app launches, so you only
  calibrate once. A separate "Reset calibration" action restores factory defaults at any time.

  HISTORY — Lock any measurement into an elegant log with automatic day grouping. Tap any entry to see full
  details, edit notes, or delete. Swipe-to-delete and Clear All are both available.

  LANDSCAPE PRECISION MODE

  Rotate your iPhone to landscape and SURFACE transforms into a long horizontal bubble vial, optimized for
  checking picture frames, shelf edges, and countertops along their length. A secondary "tipping" indicator
  helps you keep the phone vertical while measuring, preventing projection errors. The big degree readout
  rolls smoothly as you adjust, giving you real-time feedback.

  DESIGN THAT FEELS LIKE A REAL TOOL

  - Obsidian Laboratory aesthetic — deep blacks, subtle glass panels, signature zen green accent color
  - Rolling digit transitions on every measurement, tuned to 120ms per value change
  - Tactile haptic feedback on level reached, save success, calibration, and tab changes
  - Rotation-lock detection — if your phone is physically held sideways but iOS is locked to portrait, a
  banner guides you to enable rotation
  - Adaptive dark mode app icon
  - All measurements in degrees, accurate to 0.1°

  PRIVACY-FIRST, BY DESIGN

  ZenLevel is a single-player utility:
  - No accounts, no login, no cloud sync
  - No tracking, no analytics, no advertising
  - No network requests of any kind
  - All measurements and calibration data stay in your device's sandbox
  - No third-party SDKs

  WHO IT'S FOR

  - Carpenters and builders verifying walls, cabinets, and frames
  - DIY homeowners hanging shelves, pictures, TVs, and mirrors
  - Photographers checking tripod and subject alignment
  - Woodworkers verifying joinery and surface flatness
  - Industrial designers and engineers who want a phone tool that feels as precise as the real thing

  ZenLevel isn't a novelty. It's a precision instrument that lives in your pocket, ready to settle any
  question about "is this level?" in seconds.

## Key features

- Surface measurement mode
- Plumb measurement mode
- Calibration and zeroing
- Measurement history log
- Landscape precision mode
- Haptic feedback
- Privacy-focused design


## Frequently asked questions about ZenLevel

### What is ZenLevel used for?

ZenLevel turns your iPhone into a precision inclinometer for measuring level and plumb. It's designed for builders, DIYers, photographers, and woodworkers who need accurate readings.

### Does ZenLevel have ads?

No, ZenLevel is ad-free and does not contain any advertisements. It also has no tracking, analytics, or network requests, ensuring a private user experience.

### How accurate is ZenLevel?

All measurements in ZenLevel are in degrees and are accurate to 0.1°. The app provides a calm, deliberate feel like a real machinist's instrument.

### Can ZenLevel be calibrated?

Yes, ZenLevel features a calibration mode. You can place your phone on a trusted flat surface, wait for the stability meter, and tap 'ZERO OUT' to calibrate.

### What measurement modes does ZenLevel offer?

ZenLevel offers four measurement modes: SURFACE for flat surfaces, PLUMB for vertical surfaces, CALIBRATE for sensor adjustment, and HISTORY to log saved measurements.

### Is ZenLevel available on Android?

Currently, ZenLevel is only supported on iPhone devices. It is designed to leverage the specific sensors and capabilities of iOS.

### How does ZenLevel handle user data?

ZenLevel is privacy-first by design. It has no accounts, no login, no cloud sync, no tracking, no analytics, and no network requests, keeping all data on your device.

### What is the 'zen moment' in ZenLevel?

The 'zen moment' occurs when you achieve perfect alignment. The entire interface shifts to a calm, luminous green, indicating true level.

## Version history (last 1 release)

### 1.0.0 — 2026-04-15

No release notes.

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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 2026-06-26.*