Comparison

digiID vs RPN

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

Head to head
About

digiID

Securely store and manage all your official identification cards on your phone. Digitize your driver's license, insurance cards, and more, with privacy controls to blur sensitive information. Verification features link to social networks for enhanced trust.

Highlights
  • Secure digital identification holder
  • Manage official ID cards
  • Privacy control to blur sensitive information
  • Virtual wallet for licenses and IDs
  • Verification via social network linking
  • Digitize insurance, membership, and other cards
Features
Read full description

Your cards and documents, ready when you need them. Keep personal copies of insurance cards, memberships, travel documents and other important records together in a private wallet on your iPhone. SCAN AND FIND Capture a document, import photos or enter details manually. On-device text recognition helps you search saved scans and details. Access your saved wallet offline. PROTECT YOUR WALLET Open your wallet with iPhone authentication. Document images and wallet information are encrypted on your device, and the app locks when it enters the background. No online wallet account is required. SHARE THE DETAILS YOU CHOOSE Select individual fields, review the outgoing text and share through an app of your choice. Unselected fields, document images, notes and recognized text are not automatically attached. Recipients can keep exported copies; those copies cannot be revoked. KEEP TRACK OF EXPIRY DATES Add expiry dates, see what needs attention and choose optional reminders. Notifications use general messages without document names or numbers. PREPARE FOR A NEW IPHONE Create an encrypted recovery backup and keep its separate recovery key safe. Both are required to restore documents. Wallet files are excluded from automatic device backup, so create a recovery backup before replacing your iPhone, deleting the app or removing its passcode. A SIMPLE PURCHASE This version is a paid download with no in-app purchases or subscription. Your local download price appears on the App Store. PERSONAL COPIES digiID stores personal document copies. It does not issue or verify credentials, provide identity-theft insurance, process card payments, or replace original identification required by authorities or businesses. Learn more: https://digiid.com/wallet/ Support: https://digiid.com/support/

About

RPN

This app is a photo-realistic simulation of the classic HP-25 scientific calculator. It offers advanced programming features, a vast function library, and modern enhancements for enhanced usability on iOS devices.

Highlights
  • Photo-realistic simulation
  • Programmable (99/999 steps)
  • 15 user-defined function keys
  • 100 symbolic labels
  • 100 visible registers
  • Program library with 150+ programs
  • Over 270 functions
Features
Read full description

RPN-25 CE is a photo-realistic simulation of Hewlett-Packard's highly popular scientific calculator HP-25 for the iPhone. Produced from August 1975 through 1978, it was the "Squash" member of the second-generation HP calculators known as the "Woodstock" series. It was also the first programmable calculator costing less than $200. RPN-25 CE simulates the HP-25C version released in July 1976. Its major improvement in that update was "Continuous Memory". While the simulator works just like the original calculator, a number of carefully designed extensions make it massively more powerful. Features: • Photo-realistic look • Programmable (99 or 999 steps), subroutines, conditional loops, branching • Insert and delete steps with automatic address correction • 15 user-defined function keys of up to 6 characters each, redefinable under program control • Programmable text messages • Program Auto-Start option upon loading • 100 symbolic labels • 100 visible registers, "non-volatile", with unrestricted store/recall arithmetic • 100 flags, visible at a glance • Single-step constants • Program comments • Program library with more than 150 programs pre-installed • More than 270 functions and operations not available on the HP-25 • 100 sounds built-in • Much faster than the original • "Live" register view supporting user interaction (run/stop, single-stepping) • "Live" stack view • Thousands separator (optional) • High-contrast display (optional) • Selectable pause length (up to a day) • Program listing view with program title and description • Program library view • Store, name and retrieve any number of programs • Sharing: Files, iCloud Drive, e-mail, AirDrop, Dropbox, copy, paste, print • Import and run RPN-32 CE and GO-25 programs • Run a large number of HP-41 programs with little or no changes • Clock display (AM/PM or 24h) • Supports Dark Mode Calculator functions: • Statistics, including clearing statistics registers only • Factorial for arbitrary arguments • Trigonometric functions (degrees, radians, grads) • Polar/rectangular conversions • Inverse, square root, logarithm, exponential, Pi • Percentage • Storage arithmetic (store and recall) • Extended stack operations • Low-battery warning • Sound alerts • ..and many, many more Details: cuveesoft.ch/rpn25

Screenshots

digiID4 screens
RPN4 screens

Verdict

The call

The clearest difference is rating: RPN at 4.3 against digiID's 3.9. RPN also leads on price ($2.99 vs $3.99) and iOS requirement (12.0 vs 17.0). digiID's advantage is ratings volume (39 vs 10). On review sentiment, update cadence, ads and in-app purchases 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

digiID costs $3.99 and RPN $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

RPN holds the better App Store score, 4.3 against 3.9. Both are backed by a comparable volume of ratings — 39 and 10 respectively. Written reviews complicate that: 83% of digiID's written reviews are positive against 80% of RPN's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

digiID ships an update every 6 weeks, RPN every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
digiID versus RPN: the parameters behind the verdict, then further details
ParameterdigiIDRPN
Price$3.99$2.99 — better
Rating3.9 (39 ratings)4.3 (10 ratings) — better
Positive reviews83.3% of reviews — better80.0% of reviews
Number of ratings39 — better10
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhoneiPhone, iPod — better
Requires iOS17.012.0 — better
Further details — not scored
Size1 MB28 MB
Age rating4+4+
DeveloperDIGIID LLCCuVee Software

Customer experience

digiID

All ratings39 ratings
Positive71.8%
Neutral7.7%
Negative20.5%
Written reviews54 reviews
Positive83.3%
Neutral7.4%
Negative9.3%

RPN

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Bugs and requests

digiID

Reported bugs

6 issues
  • App no longer accepts new cards
  • Blank screen when adding new cards
  • Blank photo when naming snapshots anything other than 'drivers license'
  • Auto image capture difficult to work
  • Images not good, small print hard to read
Show 1 more
  • digiID watermark imprints across address

Requested features

11 requests
  • Add NFC support
  • Allow importing from other files/free version
  • Option to download IDs from other files
  • Ability to delete incorrect IDs
  • Ability to change PIN length
Show 6 more
  • Customizable order of presentation for cards
  • Ability to sort IDs within the app
  • Group IDs by category
  • Add to Apple Wallet
  • Allow sending images as email attachments
  • Allow importing pictures from Photos library

RPN

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

digiID

No in-app purchases

None

RPN

No in-app purchases

Questions

Is digiID free?
digiID costs $3.99, with no in-app purchases.
Is RPN free?
RPN costs $2.99, with no in-app purchases.
Which has better reviews, digiID or RPN?
RPN is rated higher. digiID averages 3.9 out of 5 from 39 ratings, while RPN averages 4.3 from 10 ratings.
Do digiID or RPN have ads?
Neither digiID nor RPN shows ads.
Which is updated more often, digiID or RPN?
digiID ships an update every 6 weeks, and RPN every 2 months. Most recently, digiID was updated on October 23, 2026 and RPN on October 24, 2026.

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