Comparison

Converter One vs Photonoter

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

Head to head
About

Converter One

Features
Read full description

Converter One is a beautifully crafted universal unit converter that runs seamlessly across iPhone, iPad, Mac, and Apple Vision Pro. Designed for simplicity and precision, it offers an elegant, distraction-free interface that feels perfectly at home in every Apple environment. FEATURES β€’ Instantly convert across all major unit types β€’ Universal design for iOS, iPadOS, macOS, and visionOS β€’ Smooth 3D experience and gesture support on Vision Pro β€’ Favorites and smart search for quick access β€’ Adaptive layout that feels natural on any device β€’ Haptic feedback and dynamic β€œliquid glass” visuals β€’ Fully offline, ad-free, and privacy-friendly SUPPORTED CATEGORIES Length, Area, Volume, Weight, Temperature, Speed, Time, Pressure, Energy, Power, Force, Angle, Data, Data Rate, Frequency, Fuel, Density, Torque, and more. PRIVACY Converter One collects no personal data and works completely offline.

About

Photonoter

Features
Read full description

Photonoter helps you capture quick notes exactly when you need them: with a photo, an image from your library, an audio recording, or a scanned barcode. Create entries in just a few taps, add notes, assign a category, set a date, and optionally schedule a reminder. Your entries are organized by date, easy to edit later, and can include useful details such as documents, receipts, warranties, recipes, or anything else you want to remember. Features: - Take a photo or choose one from your photo library - Record and play back audio notes - Scan common barcodes and QR codes - Add text notes, categories, dates, and reminders - View entries grouped by day - Edit saved entries whenever needed - Zoom into saved images - Store data in iCloud when available, with local storage as fallback - Manually sync your entries Photonoter is made for everyday moments: receipts, product codes, documents, ideas, appointments, shopping reminders, warranty notes, and all the small things you do not want to lose.

Screenshots

Converter One4 screens
Photonoter4 screens

Verdict

The call

The clearest difference is price: Photonoter at Free against Converter One's $0.99. Photonoter also leads on update cadence (every 6 weeks vs every 6 months). Converter One's advantage is iOS requirement (17.6 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Photonoter is free to download; Converter One costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Converter One ships an update every 6 months, Photonoter every 6 weeks. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

Scorecard3 real differences Β· 3 level
Converter One versus Photonoter: the parameters behind the verdict, then further details
ParameterConverter OnePhotonoter
Price$0.99Free β€” better
Update frequencyEvery 6 monthsEvery 6 weeks β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.6 β€” better26.0
Further details β€” not scored
Size10 MB4 MB
Age rating4+4+
DeveloperAshkan ZanjaniMichael Schwarz

In-app purchases

None

Converter One

No in-app purchases

None

Photonoter

No in-app purchases

Questions

Is Converter One free?
Converter One costs $0.99, with no in-app purchases.
Is Photonoter free?
Photonoter is free to download, with no in-app purchases.
Do Converter One or Photonoter have ads?
Neither Converter One nor Photonoter shows ads.
Which is updated more often, Converter One or Photonoter?
Converter One ships an update every 6 months, and Photonoter every 6 weeks. Most recently, Converter One was updated on October 30, 2026 and Photonoter on October 28, 2026.

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