OOReader vs Spectra Connect
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
OOReader
View office documents from various suites, including OpenOffice, LibreOffice, and Microsoft Office formats, as well as PDFs. Convert documents to PDF for easy sharing and printing, with an internet connection required for conversion.
- View ODF, DOCX, XLSX, PPTX, PDF
- Convert documents to PDF
- Share and print documents
- Page-by-page viewing
- Search within documents
- Password protected document viewing (PRO)
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OOReader is the essential mobile viewer for all your office documents. Easily open and view files created with OpenOffice and LibreOffice (Writer, Calc, Impress), common Microsoft Office formats (Word, PowerPoint, Excel), PDFs, and many other documents. Instantly access all your critical information, regardless of the file type: OpenOffice / LibreOffice (ODF Standard): โข Writer: ODT, OTT, STW, SXW โข Calc: ODS, OTS, STC, SXC โข Impress: ODP, OTP, SDD, SDP โข Draw & Math: ODG, OTG, STD, SXD, ODF, ODC, SXM, MML Microsoft Office: โข Word: DOC, DOT, DOCX, DOTX, DOCM โข Excel: XLS, XLT, XLSX, XLTX, XLSM โข PowerPoint: PPS, PPT, POT, PPSX, PPTX, POTX โข Visio: VDX, VSD, VSDX Other Formats: โข PDF (Adobe Portable Document Format) โข RTF (Rich Text Format, WordPad) โข Legacy: WordPerfect, Lotus 1-2-3, QuattroPro, WordPro, QuarkXPress Key Features: โข Quick PDF Conversion: Easily convert any supported document into a standard PDF file for reliable sharing or archival. โข Sharing & Printing: Instantly share the converted PDF via email or to other apps, or print the document directly. โข Optimal Viewing: Seamless page-by-page or slide-by-slide reading modes. โข Essential Tools: Use the built-in search function to find specific text within long documents. โข Advanced Features (PRO Upgrade): โฆ Open documents with password protection. โฆ View documents with unlimited pages (removes the 100-page limit). Important Notes: โข OOReader is a document viewer only. File content cannot be edited or modified. โข To perform document conversion for accurate viewing, OOReader utilizes an online service. An Internet connection is required for this conversion process.
Spectra Connect
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RESEARCH USE ONLY โ NOT A MEDICAL DEVICE mBrainTrain amplifiers are laboratory research instruments sold to research institutions. They are not medical devices, hold no medical device clearance in any jurisdiction, and none is claimed. This app is not intended for diagnosis, treatment, monitoring, or any clinical decision-making, and is not for use on patients. It produces no measurement result or interpretation and does not record, store, or export data. Spectra Connect connects your iPhone or iPad to an mBrainTrain wireless EEG amplifier. It covers what you do before a recording starts: find the amplifier, check electrode contact, and look at the live signal. REQUIRES AN mBrainTrain AMPLIFIER The app controls physical hardware. Without an amplifier powered on and in Bluetooth range, there is nothing to connect to. CONNECTING Nearby amplifiers are listed by name, each shown with the colour of the physical unit so you can tell several apart. You can also hold an iPhone against the NFC tag on an amplifier to connect to that unit directly. NFC is iPhone only. IMPEDANCE Your montage is drawn on a head map with live contact impedance for each electrode, colour-coded against thresholds you set. against the reference alone, and select which electrodes carry through to the signal view. SIGNAL One lane per channel, scrolling. The filter can be toggled, pinch changes the amplitude scale, and TTL event markers appear I they mark. LAYOUTS Built-in layouts cover the standard montages along cEEGrid. You can import your own as an .sfp file from Files, Mail or AirDrop. Layouts that need more channels than available are hidden. SUPPORTED AMPLIFIERS Spectra โ 16 channels Smarting S โ 16 channels PRO โ 32 channels PRO X โ 64 channels
Screenshots
Verdict
The clearest difference is in-app purchases: Spectra Connect at none against OOReader's 1. Spectra Connect also leads on ads (none vs shown). OOReader's advantage is iOS requirement (16.6 vs 18.0). On price, update cadence and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. OOReader sells 1 one-off in-app purchase. Spectra Connect asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | OOReader | Spectra Connect |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 53.0% of reviews | โ |
| Update frequency | Every 2 months | Every 2 months |
| Ads | Yes | No โ better |
| In-app purchases | Yes | No โ better |
| Monetization | Free with in-app purchases | โ |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 โ better | 18.0 |
| Further details โ not scored | ||
| Size | 37 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | BML Solutions Inc. | mBrainTrain |
Bugs and requests
OOReader
Reported bugs
4 issues- Crashes when opening files
- Inconsistent file handling (caching issues)
- Inability to open larger documents
- Compatibility issues with newer iOS versions
Requested features
6 requests- Add search and delete functions
- Improve handling of password-protected files
- Increase file size/page limit
- Add editing capabilities
- Improve font/formatting preservation
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- Provide more cloud storage integration options
Spectra Connect
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OOReader
- OOReader Pro$3.99
Spectra Connect
No in-app purchases
Questions
Is OOReader free?
Is Spectra Connect free?
Do OOReader or Spectra Connect have ads?
Which is updated more often, OOReader or Spectra Connect?
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