Comparison

SolarAlign Pro vs Resistor Decoder

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

Head to head
About

SolarAlign Pro

Features
Read full description

SolarAlign Pro: Sun & Tilt โ€“ Smart Solar Panel Optimization Get maximum energy from every panel with professional-grade alignment tools. Whether you're installing rooftop solar, managing an RV setup, or working as a professional installer, SolarAlign Pro provides the precision you need to optimize your solar yield right from your iPhone. Try Pro free for 7 days! After your trial, continue with Pro for $4.99/month or $29.99/year. WHAT'S INCLUDED Obstruction Mapper: Stand at the install spot, point your phone at nearby trees or buildings, and tap to mark them. The app calculates exactly how many hours per year each obstruction steals from your panels โ€” shown month by month and overlaid directly on the Horizon Map. Real-Time Alignment: Precision tilt and azimuth tools to find the perfect angle for your panels instantly. Horizon Map: Full-year polar sun path visualization with your mapped obstructions overlaid โ€” see which sun arcs are blocked before a single panel goes up. ROI Calculator: Estimate your annual savings factoring in both alignment efficiency and shading loss. See exactly what obstructions are costing you in dollars per year. Seasonal Adjustment: Fine-tune your tilt for Winter and Summer to maintain peak efficiency year-round. Job Manager: Organize multi-panel installations and professional projects in one place. System Sizing: Built-in tools for Battery and Inverter sizing to ensure your system is perfectly balanced. Professional Reports: Generate and export full PDF site reports with all installation data. Best Time Guidance: Know the optimal alignment window based on your specific GPS location. WHO IT'S FOR Homeowners & DIYers looking to maximize their rooftop ROI. Professional Installers needing quick site surveys, shade analysis, and PDF reporting. Off-Grid & Van Lifers optimizing portable panels for mobile living. RV & Marine Users ensuring consistent power while off the grid. SUBSCRIPTION INFORMATION Pro Monthly: $4.99/month Pro Yearly: $29.99/year 7-day free trial for new subscribers. Payment is charged to your Apple ID after the trial ends. Subscriptions auto-renew unless canceled 24 hours before the period ends. Manage or cancel in your Apple ID account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fennec-it.com/privacy/

About

Resistor Decoder

Features
Read full description

Are you an electronics hobbyist, student, or electrical engineer? Resistor Decoder is your ultimate companion to quickly and accurately calculate and identify resistor values on the go. Whether you are working with surface-mount devices (SMD) on a modern PCB or classic through-hole color-banded resistors, this app provides instant results without any hassle. Key Features: SMD Resistor Decoder 3-Digit & 4-Digit Codes: Decode standard SMD resistor markings instantly. EIA-96 System: High-precision 1% resistor code decoding using the standard multiplier lookups. Letter-Notation Codes: Easily read codes with letter values (e.g., R, K, M as decimal points). Color Band Resistor Calculator Multi-Band Support: Supports 4-band, 5-band, and 6-band color configurations. Comprehensive Details: Identifies not just the resistance value, but also the exact Tolerance and Temperature Coefficient (ppm/K). Interactive UI: Tap and select colors visually to instantly watch the value update. Built for Productivity Clean & Intuitive Interface: No complicated menus, get your answers in just a few taps. Completely Offline: Use it in the lab, workshop, or classroom without needing an internet connection. Lightweight & Fast: Optimized to run smoothly on any mobile device. Stop guessing resistor values or manually scrolling through confusing color charts. Download Resistor Decoder today and make your electronics projects easier and faster!

Screenshots

SolarAlign Pro3 screens
Resistor Decoder4 screens

Verdict

The call

The clearest difference is in-app purchases: Resistor Decoder at none against SolarAlign Pro's 2. Resistor Decoder also leads on update cadence (every 9 days vs monthly). On price, ads, device support and iOS requirement 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. SolarAlign Pro sells 2 in-app purchases, starting at $4.99 per month. Resistor Decoder asks for nothing beyond the download.

UpkeepUpdate frequency

SolarAlign Pro ships an update monthly, Resistor Decoder every 9 days. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

Scorecard2 real differences ยท 4 level
SolarAlign Pro versus Resistor Decoder: the parameters behind the verdict, then further details
ParameterSolarAlign ProResistor Decoder
PriceFreeFree
Update frequencyMonthlyEvery 9 days โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS15.115.0 โ€” better
Further details โ€” not scored
Size29 MB72 MB
Age rating+174+
DeveloperEdry GarciaESDEV Teknoloji

In-app purchases

2 purchases

SolarAlign Pro

Subscriptions2
  • Premium Monthly7 Days trial$4.991 Month
  • Premium Yearly7 Days trial$29.991 Year
None

Resistor Decoder

No in-app purchases

Questions

Is SolarAlign Pro free?
SolarAlign Pro is free to download, with in-app purchases available.
Is Resistor Decoder free?
Resistor Decoder is free to download, with no in-app purchases.
Do SolarAlign Pro or Resistor Decoder have ads?
Neither SolarAlign Pro nor Resistor Decoder shows ads.
Which is updated more often, SolarAlign Pro or Resistor Decoder?
SolarAlign Pro ships an update monthly, and Resistor Decoder every 9 days. Most recently, SolarAlign Pro was updated on October 5, 2026 and Resistor Decoder on September 30, 2026.

Other comparisons