Comparison

resistor code calculator+ vs Smart Photos Backup

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

Head to head
About

resistor code calculator+

Quickly determine resistor values using the standard color-coding system. Ideal for electronics enthusiasts, students, and makers working on projects. Instantly calculates resistance without needing to memorize color codes.

Highlights
  • Calculates 3, 4, 5, and 6-band resistors
  • Easy-to-use interface
  • Industry-standard color codes
  • Instant value calculation
  • Reference for electronics projects
Read full description

Resistor Color Code Calculator A handy reference app for calculating resistor values using the standard color-coding system. Perfect for makers, engineers, students, and hobbyists working with Arduino, Raspberry Pi, or any electronic projects. Key Features: • Comprehensive support for 3, 4, 5, and 6-band resistors • Easy-to-use interface • Industry-standard color codes • Instant value calculation Whether you're breadboarding a prototype, repairing electronics, or learning about circuits, this app helps you quickly identify resistor values without memorizing the color code system. Simply select the colors on your resistor and get the resistance value instantly. Essential for: • Electronics enthusiasts • Engineering students • Makers and DIY enthusiasts • Arduino/Raspberry Pi projects • Electronics repair and maintenance • Circuit design and prototyping Never struggle with resistor color codes again - keep this practical reference tool in your pocket!

About

Smart Photos Backup

Read full description

Running out of iPhone storage?

 Back up your photos and videos directly to a USB drive or external storage — no cloud or computer required.

 Smart Photos Backup helps you back up your memories, free up iPhone space, browse your offline Photo Data Library, and restore photos whenever you need them.

 KEY FEATURES

 • Back Up Photos & Videos
 Select photos and videos, check the amount of storage you can free up, and back them up to your connected external drive.

 • Free Up iPhone Storage 
Back up your memories first, then remove backed-up photos from your iPhone when you’re ready.

 • Browse & Restore
 Browse photos stored on your external drive and restore them to your iPhone when needed.

 • Photo Data Library 
Keep your own photo information — including thumbnails, dates, and locations — in a local Photo Data Library. It is separate from Apple’s Photos Library.

 • Organize by Time, Location & Size
 Find and manage your photos using the information that matters to you.

 • Smart Journeys
 Automatically group photos from trips and events to make your memories easier to explore.

 • Create Video Clips
 Select photos and videos and turn your memories into a video with music.

 NO CLOUD REQUIRED 
Your photos can stay on the storage you own. No account or cloud storage is required for your local backup workflow.

 IMPORTANT 
Connecting an external drive uses your iPhone’s charging port, so your iPhone cannot be charged through the same port while the drive is connected.

 Smart Photos Backup is designed for people who want a simple way to keep their photos safe, offline, and under their own control.

Screenshots

resistor code calculator+4 screens
Smart Photos Backup3 screens

Verdict

The call

The clearest difference is in-app purchases: resistor code calculator+ at none against Smart Photos Backup's 1. resistor code calculator+ also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). Smart Photos Backup's advantage is update cadence (every 5 days vs every 3 weeks). On price and ads 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. Smart Photos Backup sells 1 one-off in-app purchase. resistor code calculator+ asks for nothing beyond the download.

UpkeepUpdate frequency

resistor code calculator+ ships an update every 3 weeks, Smart Photos Backup every 5 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 5 level
resistor code calculator+ versus Smart Photos Backup: the parameters behind the verdict, then further details
Parameterresistor code calculator+Smart Photos Backup
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better17.0
Further details — not scored
Size25 MB13 MB
Age rating4+4+
Developer佳 黄晓敏 蔡

In-app purchases

None

resistor code calculator+

No in-app purchases

1 purchases

Smart Photos Backup

One-time1
  • Smart Photos Backup Pro$1.99

Questions

Is resistor code calculator+ free?
resistor code calculator+ is free to download, with no in-app purchases.
Is Smart Photos Backup free?
Smart Photos Backup is free to download, with in-app purchases available.
Do resistor code calculator+ or Smart Photos Backup have ads?
Neither resistor code calculator+ nor Smart Photos Backup shows ads.
Which is updated more often, resistor code calculator+ or Smart Photos Backup?
resistor code calculator+ ships an update every 3 weeks, and Smart Photos Backup every 5 days. Most recently, resistor code calculator+ was updated on October 28, 2026 and Smart Photos Backup on October 31, 2026.

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