Comparison

CardKeep vs Stud Finder

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

Head to head
About

CardKeep

Features
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Keep a handy copy of the cards you carry. CardKeep keeps your membership, loyalty, insurance, library, and other everyday card images together on your iPhone or iPad. When you need a card number or the details on the back, you can find the card without digging through your wallet. Add cards your way Scan a card with your camera or choose images from your photo library. Save the front, add an optional back, and swap the sides before saving. Find the right card Give each card a title and search your collection by name. Add notes and record expiration dates to keep useful details with each card. Share the side you need Export just the front, just the back, or both sides as images. Send a copy or save it to Files using the share menu. From your gym membership to your library card, CardKeep gives your card copies a place of their own.

About

Stud Finder

Transform your iPhone into a precise wall scanner. Easily locate studs, pipes, wires, and other hidden metal objects for DIY projects and home improvements. Offers multiple detection modes and adjustable sensitivity for accurate results.

Highlights
  • All-in-one wall scanner
  • Detects studs, pipes, wires, and more
  • 4 distinct detection modes
  • Adjustable sensitivity
  • Clear visual and audio alerts
  • Uses iPhone's magnetometer
Features
Read full description

Instantly turn your iPhone into a powerful wall scanner and stud finder! Whether you’re hanging a picture, mounting a TV, or tackling a DIY project, quickly detect wood studs, metal pipes, screws, bolts, and even live wires hidden behind walls with precision and ease. Key Features: • All-in-One Wall Scanner – Locate studs, beams, joists, nails, screws, pipes & wires. • 4 Detection Modes – Switch between Stable, Balanced, High Sensitivity & Improved Stable for every situation. • Adjustable Sensitivity – Fine-tune detection for maximum accuracy. • Easy to Use – Clear visual display & optional audio alerts guide you directly to your target. How It Works: Our app uses your iPhone’s built-in magnetometer to detect changes in the magnetic field caused by metal objects and studs. For best results, remove your case and calibrate by moving your device in a figure-8 motion before scanning. Note: Accuracy may vary depending on device hardware, wall thickness, and environment. Always use caution before drilling. Download Stud Finder: Metal Detector today and make every project faster, safer, and smarter!

Screenshots

CardKeep2 screens
Stud Finder4 screens

Verdict

The call

The clearest difference is price: Stud Finder at Free against CardKeep's $2.99. Stud Finder also leads on update cadence (every 5 months vs every 28 months). CardKeep's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement 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

Stud Finder is free to download; CardKeep costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CardKeep ships an update every 28 months, Stud Finder every 5 months. The most recent releases landed on October 7, 2026 and October 22, 2026 respectively.

Scorecard3 real differences · 7 level
CardKeep versus Stud Finder: the parameters behind the verdict, then further details
ParameterCardKeepStud Finder
Price$2.99Free — better
Rating—3.7 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 28 monthsEvery 5 months — better
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhone, iPad — betteriPhone
Requires iOS17.517.0 — better
Further details — not scored
Size0 MB9 MB
Age rating4+4+
DeveloperJonathan JudelsonCao Tran

In-app purchases

None

CardKeep

No in-app purchases

None

Stud Finder

No in-app purchases

Questions

Is CardKeep free?
CardKeep costs $2.99, with no in-app purchases.
Is Stud Finder free?
Stud Finder is free to download, with no in-app purchases.
Do CardKeep or Stud Finder have ads?
Stud Finder shows ads; CardKeep does not.
Which is updated more often, CardKeep or Stud Finder?
CardKeep ships an update every 28 months, and Stud Finder every 5 months. Most recently, CardKeep was updated on October 7, 2026 and Stud Finder on October 22, 2026.

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