Comparison

Open Reader vs Smart Metal Detector & EMF

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Open Reader

This app allows you to view a wide range of document formats, including Open Document files, PDFs, and Microsoft Office documents. It also functions as a robust document manager, enabling file downloads from various sources and cloud storage services.

Highlights
  • View ODT, ODS, ODP files
  • Download files from email and web
  • Manage files with folders and renaming
  • View PDF, Word, Excel, PowerPoint
  • Integrates with Google Drive, Dropbox, Box
  • Wireless file transfer
Features
Read full description

Open Reader is an iPhone/iPad/iPod Touch app which can display most document formats including Open Document files (ODT, ODS, ODP) and can serve as a document manager and downloader for you. Feature: 1. Display Open Office documents, including Open Document formats ODT, ODS, ODP. 2. Download files from email through Mail app 3. Download files from Internet/Web through Safari 4. Manage files in the app, support folders, renaming file, moving file to another folder by copy/cut and paste. 5. Display PDF, MS Word, Excel, PowerPoint, iWork documents(Pages, Keynotes, Numbers). 6. Email files as attachment 7. Support device display rotation 8. Display images(JPG, GIF, PNG, BMP, TIFF) 9. Display RTF, HTML, TXT files 10. Print documents from iPhone/iPod Touch/iPad with iOS 4.2 and above 11. Transfer file between OpenReader and desktop using iTunes file sharing 12. Wireless File Transfer between Open Reader and your computer using built-in WiFi server and a web browser 13. Support for GoogleDrive, including download files, upload files, create folder, delete files uploaded by Open Reader, delete folders created by Open Reader. 14. Support for Dropbox, including download files, upload files, create folder, delete files/folders. 15. Support for Box, including download files, upload files, create folder, delete files/folders.

About

Smart Metal Detector & EMF

This tool uses your phone's magnetic sensor to detect nearby metal by measuring magnetic field strength. It alerts you with vibrations and sounds when metal is close, and can help locate hidden devices or electrical wires.

Highlights
  • Detects metal using magnetic sensor
  • Measures magnetic field strength (EMF)
  • Vibration and sound alerts
  • Adjustable sensitivity
  • Locates electrical wires and pipes
  • Scans for hidden devices
Features
Read full description

Metal Detector is an iOS application that detects the presence of metal nearby by measuring the magnetic field value. This useful tool uses the magnetic sensor built into your mobile device and shows the magnetic field level in μT (microtesla). The magnetic field level (EMF) in nature is about 49 μT (microtesla) or 490 mG (milligauss); 1 μT = 10 mG. If any metal is nearby, the value of the magnetic field will increase. The metal detector allows you to identify any metal object in the area because all metals generate a magnetic field whose strength can be measured with this tool. The usage is simple: launch this app on your mobile device and move it around. You will see that the magnetic field level shown on the screen is constantly fluctuating. Colorful lines represent the three dimensions and the numbers on top show the value of the magnetic field level (EMF). The chart will increase, and the device will vibrate and make sounds, announcing that the metal is close. You can change the sensitivity of vibration and sound effects in the settings. You might use the Metal Detector to find electrical wires in walls (like a stud finder), iron pipes on the ground... or pretend it's a ghost detector and scare someone! You can also use this magnetometer as a scanner to find hidden devices – cameras, microphones, or voice recorders! Metal Detector is available in the language set on your phone – now also in Russian, Spanish, and Indonesian! You can also find it in Portuguese, Turkish, and French. Now the app also has its versions in Arabic and Farsi! If you enjoy the app and want even more – you can get a pro version! Check it out in the application menu. The accuracy of the tool depends entirely on the sensor in your mobile device. Please note that due to electromagnetic waves, the magnetic sensor is affected by electronic equipment. Metal Detector cannot detect gold, silver, and coins made of copper. They are classified as non-ferrous, which has no magnetic field. But maybe you will find a metal box with some treasure inside! Try this useful tool and other apps from the Netigen Tools series! Attention! Not every model of a smartphone has a magnetic field sensor. If your device does not have one, the application will not work. Sorry for the inconvenience. Privacy Policy: https://zipoapps.com/metaldetectorios/privacy Terms & Conditions: https://zipoapps.com/metaldetectorios/terms

Screenshots

Open Reader4 screens
Smart Metal Detector & EMF4 screens

Verdict

The call

The clearest difference is price: Smart Metal Detector & EMF at Free against Open Reader's $4.99. Smart Metal Detector & EMF also leads on review sentiment (62% vs 17%) and rating (4.4 vs 1.0). Open Reader's advantage is in-app purchases (none vs 4) and ads (none vs shown). On update cadence and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Smart Metal Detector & EMF is free to download; Open Reader costs $4.99 up front. Smart Metal Detector & EMF sells 4 in-app purchases, starting at $4.99 per 7 days. Open Reader asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Smart Metal Detector & EMF holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Smart Metal Detector & EMF has 270 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 17% of Open Reader's written reviews are positive against 62% of Smart Metal Detector & EMF's.

UpkeepUpdate frequency

Open Reader ships an update every 2 months, Smart Metal Detector & EMF every 6 weeks. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

Scorecard8 real differences · 2 level
Open Reader versus Smart Metal Detector & EMF: the parameters behind the verdict, then further details
ParameterOpen ReaderSmart Metal Detector & EMF
Price$4.99Free — better
Rating1.0 (2 ratings)4.4 (270 ratings) — better
Positive reviews17.1% of reviews61.5% of reviews — better
Number of ratings2270 — better
Update frequencyEvery 2 monthsEvery 6 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size36 MB118 MB
Age rating4+4+
DeveloperUMateYZipoApps

Customer experience

Open Reader

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews41 reviews
Positive17.1%
Neutral4.9%
Negative78.0%

Smart Metal Detector & EMF

All ratings269 ratings
Positive84.4%
Neutral3.7%
Negative11.9%
Written reviews13 reviews
Positive61.5%
Neutral0.0%
Negative38.5%

In-app purchases

None

Open Reader

No in-app purchases

4 purchases

Smart Metal Detector & EMF

Subscriptions2
  • 1 week subscription3 Days trial$4.997 Days
  • Weekly Access3 Days trial$8.997 Days
One-time2
  • Advertising free version$0.99
  • Forever one-time payment$34.99

Questions

Is Open Reader free?
Open Reader costs $4.99, with no in-app purchases.
Is Smart Metal Detector & EMF free?
Smart Metal Detector & EMF is free to download, with in-app purchases available.
Which has better reviews, Open Reader or Smart Metal Detector & EMF?
Smart Metal Detector & EMF is rated higher. Open Reader averages 1.0 out of 5 from 2 ratings, while Smart Metal Detector & EMF averages 4.4 from 270 ratings.
Do Open Reader or Smart Metal Detector & EMF have ads?
Smart Metal Detector & EMF shows ads; Open Reader does not.
Which is updated more often, Open Reader or Smart Metal Detector & EMF?
Open Reader ships an update every 2 months, and Smart Metal Detector & EMF every 6 weeks. Most recently, Open Reader was updated on October 27, 2026 and Smart Metal Detector & EMF on October 29, 2026.

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