Comparison

NASA Battery Viewer vs Site Diary

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

Head to head
About

NASA Battery Viewer

Monitor battery information from a Bluetooth device with customizable display options. Configure units, view charging status, and rename your device for easy identification.

Highlights
  • Customizable display fields
  • Primary field selection
  • Charging/discharging indicator
  • Unit property configuration
  • Bluetooth LE communication
  • Automatic device connection
  • Unit renaming
Features
Read full description

The NASA Battery Viewer displays the battery monitor information in a clear and simple way. The app allows you to configure which fields are displayed and where, allowing you to choose the most important field as the primary field. The charging/discharging display field will appear in red when discharging. The app also allows you to set the unit's properties (capacity, operating temperature, unit name). The app communicates with the BM-1 unit over Bluetooth LE. It will automatically connect to your BM-1 unit with the configured Bluetooth name. If the unit's name doesn't match any BM-1 units in range will be offered to you so you can choose to connect. The unit rename feature allows you to assign your own name to your BM-1 unit.

About

Site Diary

Streamline construction daily reporting with this app, replacing paper logs with digital entries for site progress, tasks, and resources. Capture real-time data, attach images, and access local weather reports, all while working offline.

Highlights
  • Real-time site progress monitoring
  • Integrated task management and allocation
  • Automatic local weather reports
  • Attach images to reports
  • Offline support and cloud synchronization
  • Export reports in PDF, Excel, or CSV
Features
Read full description

Site Diary app replaces the existing paper construction daily reports, site journal or daily logs, where field workers make a report of things that occurred on their projects. With Site Diary app, we make the whole process quick, fun and simple so you both have a detailed daily report and time left to focus on building more. We developed Site Diary to address the needs of site engineers, foremen and site managers working in construction organizations, contractors and installation teams both large and small. "Site Diary allowed me to keep track of construction progress and emerging issues in real time” - Christopher Pletcher, Municipal Engineering Manager, Ayres Associates Task management/allocations feature The first product to integrate daily reports and task management. Users can create a task, add information about the task (manpower, equipment & materials to be used) and the persons it assigned to. Report progress on a task by creating a work log. The diary form will be automatically filled with all the task info which will make it a lot quicker for users to fill their daily reports. Site Diary Features include - Real-time site progress and monitoring, whereby users have visibility of work being done by site staff. Submitted reports are immediately available for review and approval by off-site personnel. - Share information. The app will allow field workers to send an email after they create an event. (This is optional) - Local weather report automatically included - every report entry is automatically linked with the prevailing weather conditions for that site at the time, which is important information to include in a daily construction report app. - Added images - photos and other images can be attached to reports. - Offline support - Sites with limited connectivity are not a problem as the app continues to perform seamlessly off-line. Data captured is saved on the device and synchronized to the cloud as soon as a connection becomes available. - User management - Add and remove users in your team - Set up site resources (labour, equipment, materials, contractors, tags) that you will use on your construction site. Tags are used to determine the type of event that is recorded, example: Safety. - Export Reports - This can be used as shift updates or project summaries and shared with staff, contractors and clients. These are done in either PDF, Excel or CSV format.

Screenshots

NASA Battery Viewer3 screens
Site Diary4 screens

Verdict

The call

The clearest difference is update cadence: Site Diary at weekly against NASA Battery Viewer's every 4 months. NASA Battery Viewer's advantage is review sentiment (100% vs 88%) and iOS requirement (11.3 vs 15.0). On price, ads, in-app purchases and monetization model 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NASA Battery Viewer ships an update every 4 months, Site Diary weekly. Both last shipped on November 2, 2026.

Scorecard3 real differences · 7 level
NASA Battery Viewer versus Site Diary: the parameters behind the verdict, then further details
ParameterNASA Battery ViewerSite Diary
PriceFreeFree
Rating—4.4 (45 ratings) — better
Positive reviews100.0% of reviews — better87.5% of reviews
Number of ratings—45 — better
Update frequencyEvery 4 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.3 — better15.0
Further details — not scored
Size9 MB67 MB
Age rating4+4+
DeveloperNeverest LimitedScript&Go

Customer experience

NASA Battery Viewer

Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Site Diary

All ratings45 ratings
Positive86.7%
Neutral6.7%
Negative6.7%
Written reviews8 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

In-app purchases

None

NASA Battery Viewer

No in-app purchases

None

Site Diary

No in-app purchases

Questions

Is NASA Battery Viewer free?
NASA Battery Viewer is free to download, with no in-app purchases.
Is Site Diary free?
Site Diary is free to download, with no in-app purchases.
Do NASA Battery Viewer or Site Diary have ads?
Neither NASA Battery Viewer nor Site Diary shows ads.
Which is updated more often, NASA Battery Viewer or Site Diary?
NASA Battery Viewer ships an update every 4 months, and Site Diary weekly. Most recently, NASA Battery Viewer was updated on November 2, 2026 and Site Diary on November 2, 2026.

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