# Field Master: Measure & Level — AR Ruler, Decibel Meter, calc > AR Ruler, Decibel Meter, calc (iPhone/iPad app by Bumjoon Lee.) - Source: https://appshunter.io/ios/app/field-master-measure-and-level/id6802022573 (this page in markdown: same URL + `.md`) - Developer: [Bumjoon Lee](https://appshunter.io/developer/6801095554) - Category: Utilities, Productivity - Price: Free - Age rating: 4+ - Requires: iOS 17.0 · 10 MB - Languages: American English, French (France), Japanese, Korean, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) - Released: 2026-08-18 - Data updated: 2026-10-02 ## What is Field Master? A camera tape measure, box volume, a bubble level, a noise meter and a scientific calculator in one app. Send what you measured as a one page report with a site photo. AR Distance and Volume Measure between two points with the camera. Before you place a point, a guide line and its length are shown, so you retake fewer measurements. Place four points and you get the volume too. Devices with LiDAR lock on more precisely, and you can switch between m, cm and ft. Bubble Level Lay the phone down for horizontal, stand it up and it switches to vertical by itself. The bubble rises to the high side just like a real one, and a 1 degree target, a 5 degree ring and a hint telling you which side is high make small tilts easy to see. A light vibration tells you when it is level. Noise Meter Read how loud it is right here in dB and keep it in the log. A colored scale shows at a glance whether it is quiet, normal, loud or harmful to your hearing. Log and Reports Values from the calculator, distance, volume, level and noise meter are saved with your notes. They group by date, you can search and filter by type, and export to CSV. Add a site name and a photo and build a one page report to send to a client or the office. Scientific Calculator Trigonometric and inverse trigonometric functions, logarithms, square root, square, reciprocal, factorial, percentage and sign change. Copy a result or save it straight to the log, and recall earlier results from the history. Quick Timer Start timing just by laying the phone down or standing it up, so it works with gloves on. Count down or count up, and it sounds when the time is done. About ads No feature is placed behind an ad. Nothing interrupts you while you measure a distance or check a level. Tap the chip at the top right of the home screen, watch one ad, and the banner stays away for the rest of the day. Seven Languages Korean, English, Japanese, Simplified and Traditional Chinese, Spanish and French, switchable inside the app at any time. Records stay on your device and are never sent to an outside server. No sign up is needed. AR measuring, the level and the noise meter give reference values from your phone's sensors. They are not certified measuring instruments and may be off, so when you need exact numbers, double check with a tape measure, a spirit level or a sound level meter. ## Is Field Master safe? Not enough ratings yet to assess Field Master. ## Is Field Master legit? Field Master: Measure & Level appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Field Master is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 5 releases) ### 1.3.4 — 2026-10-02 New home screen with larger tool tiles in the order you use them most. Level: the bubble rises to the high side, with a 1 degree target, a 5 degree ring and a high side hint. Noise meter: a scale shows which range the current level is in. On small screens like iPhone SE, the calculator's bottom row and save buttons no longer hide behind the ad. Calculator: fixed large numbers, sin 180, e and pi, and the plus minus and ANS keys. The noise meter starts again after a call or connecting earphones. Quick Timer now detects positions only on the home and timer screens, and tells you when notifications are off. Also fixed the AR aiming circle, the feet display and CSV cells that broke in Excel. ### 1.3.3 — 2026-09-29 The calculator's Copy, Save to log and DEG/RAD buttons and the close button in Settings were small and sometimes missed a tap. That is fixed. If the app stays open past midnight, the banner-off option now follows the new date. ### 1.3.2 — 2026-09-26 Settings now has Rate on the App Store. Now and then, a small window may ask you to leave a rating. Every rating helps a lot. ### 1.3.1 — 2026-09-22 Fixed a problem where level and calculator entries disappeared if you closed the app right after tapping Save. Entries are now saved the moment you tap, and you'll see that they're saved. Deleting an entry or editing a note is kept right away, and CSV exports include your edited notes. The calculator now handles a negative after a power, like 10^-3, and shows a result even if you forget a closing bracket. The noise average is now calculated from sound energy, and the quick timer no longer plays its sound twice or late. If camera access is off, AR Measure shows you how to turn it on. ### 1.3 — 2026-09-21 A quick timer has arrived. Start it just by laying the phone down or standing it up, and it sounds when the time is done. Count down or count up, whichever you need. A noise meter has arrived. Read how loud it is here in dB and keep it in the log. You can turn your records into a one page report. Put the site name, a photo and that day's entries on one image and send it straight to a client or the office. Watch one ad on the home screen and the banner stays away for the rest of the day. No feature is placed behind an ad. The home screen is tidier. Tapping a tool opens it right away and the bottom tab bar is gone. The tool icons are clearer too. AR measurement now shows a guide line and its length before you place a point. Three points already draw the base rectangle, so you can see straight away whether it is square. The calculator display is larger, and the level's save button is no longer hidden behind the banner. ## Apps similar to Field Master | App | Rating | Price | Category | | --- | --- | --- | --- | | [Will It Fit Box Calculator](https://appshunter.io/ios/app/will-it-fit-box-calculator/id6772263373) | — | Free | Utilities | | [BluetoothLE RTK](https://appshunter.io/ios/app/bluetoothle-rtk/id1599429026) | — | Free | Utilities | | [Ruler - Screen Measure Tool](https://appshunter.io/ios/app/ruler-screen-measure-tool/id6757359013) | — | Free | Utilities | | [Digital Clock Widget · StandBy](https://appshunter.io/ios/app/digital-clock-widget-standby/id6467921671) | 4.6 (18) | Free | Utilities | | [Habencall](https://appshunter.io/ios/app/habencall/id6749261848) | 2.0 (1) | Free | Utilities | | [Tarjeta Ciudad Getafe](https://appshunter.io/ios/app/tarjeta-ciudad-getafe/id6740854549) | — | Free | Utilities | ## More apps by Bumjoon Lee - [IdleCrawler](https://appshunter.io/ios/app/idlecrawler/id6801095552) - [TypeDay: Daily MBTI Fortune](https://appshunter.io/ios/app/typeday-daily-mbti-fortune/id6803381964) - [Catendar: Shift Work Calendar](https://appshunter.io/ios/app/catendar-shift-work-calendar/id6803623896) - [MarkTrail: Korea Travel Stamps](https://appshunter.io/ios/app/marktrail-korea-travel-stamps/id6805505380) - [Mochi Clash](https://appshunter.io/ios/app/mochi-clash/id6810456480) All apps by Bumjoon Lee: https://appshunter.io/developer/6801095554 --- *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 2026-10-02.*