Comparison

iAttenuation vs Satellite Imagery Data Process

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

Head to head
About

iAttenuation

This app calculates resistor values for various passive attenuator networks. It supports T, Pi, H, O, and Minimum Loss Pad configurations, allowing users to input impedance and desired attenuation. It can also adjust resistor values to standard tolerances.

Highlights
  • Calculates resistor values for passive attenuator networks
  • Supports Tee, Pi, H, O, and Minimum Loss Pad configurations
  • Input and output impedance calculation
  • Desired attenuation input
  • Adjusts resistor values to standard tolerances (1%, 5%, 10%)
Features
Read full description

Passive attenuators are two port / four terminal resistive networks that are designed to reduce (or attenuate, hence their name) the power between a source and load. They can also match the impedance between the source and load. They are used in a variety of audio and radio / RF applications. iAttenuation calculates resistor values for the following types of attenuator networks: Tee Network Pi Network H (Balanced Tee) O (Balanced Pi) Minimum Loss Pad Just enter in the input and output impedance values, and the desired attenuation, and iAttenuation does the rest! iAttenuation can also adjust the calculated resistor values to match the nearest standard 1%, 5%, or 10% tolerance values.

About

Satellite Imagery Data Process

Features
Read full description

Satellite Imagery Data Processing brings advanced satellite image analysis and remote sensing tools to iPhone and iPad in a modern, intuitive workspace. Import, process, visualize, and export satellite imagery with powerful tools designed for researchers, GIS professionals, environmental analysis, agriculture monitoring, urban planning, and geospatial exploration. Work with multispectral imagery, apply intelligent enhancement, analyze terrain and vegetation, and transform raw satellite datasets into actionable insights—all from a mobile experience optimized for performance and precision. Features: • Import satellite imagery and geospatial raster datasets • Support for GeoTIFF, TIFF, JPEG2000, NetCDF, HDF5, and more • View multispectral layers with smooth zoom and GPU acceleration • Generate NDVI, false color, infrared, thermal, and custom visualizations • Apply image enhancement, correction, denoising, and cloud reduction • Perform band analysis, classification, and change detection workflows • AI-assisted land, water, road, and object recognition • Measure distance, area, and geographic regions • Create professional exports and reports • Sync projects across devices and cloud storage providers Designed for modern iOS devices, Satellite Imagery Data Processing combines scientific capability with an elegant interface built for mobile productivity. Upgrade to Pro for advanced processing, AI analysis, unlimited exports, and expanded cloud workflows. We currently offer the following auto-renewing subscription option: -$7.99 per month -$34.99 per month Payment will be charged to iTunes Account at confirmation of purchase. Your subscription will automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed and auto-renewal may be turned off by going to the Account Settings after purchase. No cancellation of the current subscription is allowed during active subscription period. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms of Use: https://tos.nguyenanhapps.com Privacy Policy: https://privacy.nguyenanhapps.com

Screenshots

iAttenuation4 screens
Satellite Imagery Data Process4 screens

Verdict

The call

The clearest difference is price: Satellite Imagery Data Process at Free against iAttenuation's $2.99. Satellite Imagery Data Process also leads on update cadence (fortnightly vs every 69 months). iAttenuation's advantage is in-app purchases (none vs 3) and iOS requirement (15.6 vs 17.0). On ads 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

Satellite Imagery Data Process is free to download; iAttenuation costs $2.99 up front. Satellite Imagery Data Process sells 3 in-app purchases, starting at $7.99 per month. iAttenuation asks for nothing beyond the download.

UpkeepUpdate frequency

iAttenuation ships an update every 69 months, Satellite Imagery Data Process fortnightly. The most recent releases landed on September 18, 2026 and September 19, 2026 respectively.

Scorecard4 real differences · 5 level
iAttenuation versus Satellite Imagery Data Process: the parameters behind the verdict, then further details
ParameteriAttenuationSatellite Imagery Data Process
Price$2.99Free — better
Rating3.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 69 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size1 MB7 MB
Age rating4+4+
DeveloperBlack Cat SystemsNguyen Anh

In-app purchases

None

iAttenuation

No in-app purchases

3 purchases

Satellite Imagery Data Process

Subscriptions2
  • Satellite Imagery Premium Monthly$7.991 Month
  • Satellite Imagery Premium Yearly$34.991 Year
One-time1
  • Satellite Imagery Premium Lifetime$49.99

Questions

Is iAttenuation free?
iAttenuation costs $2.99, with no in-app purchases.
Is Satellite Imagery Data Process free?
Satellite Imagery Data Process is free to download, with in-app purchases available.
Do iAttenuation or Satellite Imagery Data Process have ads?
Neither iAttenuation nor Satellite Imagery Data Process shows ads.
Which is updated more often, iAttenuation or Satellite Imagery Data Process?
iAttenuation ships an update every 69 months, and Satellite Imagery Data Process fortnightly. Most recently, iAttenuation was updated on September 18, 2026 and Satellite Imagery Data Process on September 19, 2026.

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