Comparison

LSPIV vs dicetest2

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

Head to head
About

LSPIV

This application enables large-scale particle image velocimetry (LSPIV) using a smartphone. It offers a non-intrusive method for measuring water surface velocity distribution in both field and lab settings. The app provides instant ortho-rectification of captured images without needing ground control points.

Highlights
  • Large-scale particle image velocimetry
  • Water surface velocity measurement
  • Non-intrusive velocimetry
  • Smartphone implementation
  • Instant ortho-rectification
  • No GCPs required
Features
Read full description

LSPIV (large-scale particle image velocimetry) is an image-based method for measuring velocity distribution on the water surface. Applications of LSPIV have been increasing for both field and laboratory experiments as unique and powerful tools for non-intrusive velocimetry using conventional imaging devices and specialized image processing software. This app utilizes a smartphone to implement LSPIV. By innovatively combining the sensors embedded in smartphones, the images captured with them can be intrinsically and instantly ortho-rectified without making recourse to GCPs. The app was developed under support by the River Fund in charge of the Foundation of River and Watershed Environment Management (FOREM), Japan; Grant-in-Aid for Young Scientists (B); and the Research Fund of Japan Institute of Country-ology and Engineering.

About

dicetest2

This free app generates strong, complex passphrases using the Diceware method. It simulates dice rolls to select words from a comprehensive list, allowing for customization with personal "salt" characters and capitalization for enhanced security.

Highlights
  • Diceware passphrase generation
  • Simulates dice rolls
  • Uses Diceware word list
  • Customizable security options
  • Displays key numbers for verification
  • Generates long or short passphrases
Features
Read full description

This simple, free, no In-App Purchases App generates a passphrase/password using the keys and values in the Diceware Passphrase Home Page word list. The app basically throws five dice for you (or 30 for 6 elements) to generate random keys to word values in the dictionary, which can then be joined together to form a complex passphrase. Key numbers are displayed in addition to the words (Values) so that you can compare them with the original Diceware data, if desired. Note: Six possible dice values, taken 5 at a time gives 6^5 = 7776 words in the database. Six PassPhrase words give 7776^6 = 2.2x10^23 possibilities (~1/3 of a mole for chemists)! That is over 2^77 = 1.5x10^23. One can also add personalized "salt" characters and Capitalize selected letters in the passphrase generated here to enable even stronger security, e.g. add every other letter of your spouse's secret nickname, in reverse alphabetical order, with a special character or two thrown in. Be creative! If you’d like a shorter, or longer passphrase possibility use fewer elements, or add multiple clicks. Refer to the The Diceware Passphrase Home Page for comments on the true randomness of computer generated random numbers. Using actual dice for this process is a better way to randomly select passphrase words. However, this app introduces the user to the Diceware concept, its word list(s) and allows you to experiment easily and generate many passphrases. The resulting suggested passphrases are offered without any warranty as to their use.

Screenshots

LSPIV1 screens
dicetest21 screens

Verdict

The call

The clearest difference is update cadence: LSPIV at every 13 months against dicetest2's every 35 months. LSPIV also leads on iOS requirement (11.0 vs 14.0). On price, rating, ratings volume 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for LSPIV against 5.0 for dicetest2. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

LSPIV ships an update every 13 months, dicetest2 every 35 months. The most recent releases landed on October 22, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
LSPIV versus dicetest2: the parameters behind the verdict, then further details
ParameterLSPIVdicetest2
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings12 — better
Update frequencyEvery 13 months — betterEvery 35 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better14.0
Further details — not scored
Size71 MB1 MB
Age rating4+4+
DeveloperRyota TsubakiRichard Loda

Customer experience

LSPIV

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

dicetest2

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

LSPIV

No in-app purchases

None

dicetest2

No in-app purchases

Questions

Is LSPIV free?
LSPIV is free to download, with no in-app purchases.
Is dicetest2 free?
dicetest2 is free to download, with no in-app purchases.
Which has better reviews, LSPIV or dicetest2?
LSPIV and dicetest2 are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do LSPIV or dicetest2 have ads?
Neither LSPIV nor dicetest2 shows ads.
Which is updated more often, LSPIV or dicetest2?
LSPIV ships an update every 13 months, and dicetest2 every 35 months. Most recently, LSPIV was updated on October 22, 2026 and dicetest2 on October 5, 2026.

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