Comparison

Solution Dilution Calculator vs Locker

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

Head to head
About

Solution Dilution Calculator

This utility app helps users calculate the precise volume of stock concentrate needed to create a diluted solution of a specific concentration and volume. It supports various concentration units and is designed for educational and research laboratory use.

Highlights
  • Dilution calculations
  • Supports mass/volume units
  • Supports weight/volume units
  • Ideal for labs and education
  • User-friendly interface
Features
Read full description

The Solution Dilution Calculator calculates the volume of stock concentrate needed to achieve a specified volume and concentration. It uses the formula: C₁V₁ = C₂V₂ where: C₁ = Initial concentration (stock solution) V₁ = Volume to be removed (aliquot) from the stock solution C₂ = Final concentration of the diluted solution V₂ = Final volume of the diluted solution (after dilution with the solvent) Designed for both teaching and research laboratories, this calculator can be used for dilution calculations with solutions expressed in mass per volume (e.g., g/L, mg/mL) or weight per volume (e.g., % w/v) concentration units. Example Dilution Calculation: Question: What volume of a 10 mM stock solution is required to prepare 20 mL of a 50 μM solution? Solution: Using the equation C₁V₁ = C₂V₂, where: C₁ = 10 mM C₂ = 50 μM V₂ = 20 mL V₁ = Unknown Steps: Enter 10 into the Concentration (start) box and select millimolar (mM). Enter 50 into the Concentration (final) box and select micromolar (μM). Enter 20 into the Volume (final) box and select milliliters (mL). The result, 100 microliters (0.1 mL), will appear automatically. Thank you for your support! Stay tuned for more updates.

About

Locker

Securely store and manage all your passwords and private information. Supports text, voice, drawings, and photos with high-strength encryption. Offers iCloud backup and restore for easy data recovery.

Highlights
  • Store text, voice, drawings, and photos
  • High-strength encryption
  • Import and export passwords
  • Gesture and fingerprint login
  • Random password generator
  • iCloud backup and restore
  • Data destruct feature
Features
Read full description

Too many passwords to remember? Still, use the same password for each site? Locker - the safest and most convenient private information manager, provides a whole new way of protecting your personal information. Store Passwords Safe and Easy. Support text, voice, hand drawing, and photo. — FEATURES — - Support import and export, easy to manage your passwords. - Support gesture and fingerprint, login faster. - Customize color and icon for the record. - High-strength encryption to ensure your data is safe. - Support text, voice, hand drawing, and photo. - Random Password Generator. - Clone record. - Powerful association features, allowing you to quickly enter data. - Support for iCloud backup and iCloud restore. Even for changing the phone or the phone had lost, it can quickly recover data. - Data destruct feature, after the wrong password more than setting times, the data will be destroyed — SECURITY — Through Apple's security mechanism scrutinized and iOS security systems, all private data can be only stored on user’s devices or iCloud by encrypted. Nobody, including developers, is able to get private data and master passwords. It can be assured that encrypted private data cannot be hacked. — LOCKER — Nowadays, everyone accesses the website with an account and password. It is dangerous when you use the same username and password. Once it had been stolen, other websites’ information is at risk of leakage. On the other hand, when you use different and complex passwords, it is very hard to remember all of them. So, YOU NEED LOCKER! Locker is a safe and convenient password manager. It is easy to use, and fast to import and input. It can manage text, hand-painted pictures, and sound recordings. It is very safe, even if the developers can not break the user's data. If any questions or feedback, please contact us by Email. we are looking forward to your feedback which is our greatest driving force to move on. support@mxcode.com * Privacy Policy: https://api.mxcode.com/html/locker/privacy/en.html * Terms of Use: https://api.mxcode.com/html/locker/terms/en.html

Screenshots

Solution Dilution Calculator4 screens
Locker4 screens

Verdict

The call

Solution Dilution Calculator and Locker both sit at 5.0 stars, but that hides the real split: 100% of Locker's written reviews are positive against 0% of Solution Dilution Calculator's. Locker also leads on price (Free vs $2.99) and update cadence (every 3 weeks vs every 22 months). Solution Dilution Calculator's advantage is in-app purchases (none vs 3) and iOS requirement (13 vs 15.6). On rating, ratings volume, ads and device support 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

Locker is free to download; Solution Dilution Calculator costs $2.99 up front. Locker sells 3 in-app purchases, starting at $1.49 per month. Solution Dilution Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Solution Dilution Calculator against 5.0 for Locker. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 0% of Solution Dilution Calculator's written reviews are positive against 100% of Locker's.

UpkeepUpdate frequency

Solution Dilution Calculator ships an update every 22 months, Locker every 3 weeks. The most recent releases landed on September 10, 2026 and September 5, 2026 respectively.

Scorecard6 real differences · 4 level
Solution Dilution Calculator versus Locker: the parameters behind the verdict, then further details
ParameterSolution Dilution CalculatorLocker
Price$2.99Free — better
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings12 — better
Update frequencyEvery 22 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13 — better15.6
Further details — not scored
Size1 MB10 MB
Age rating4+4+
DeveloperNitrio晖 姚

Customer experience

Solution Dilution Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Locker

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Solution Dilution Calculator

No in-app purchases

3 purchases

Locker

Subscriptions3
  • 1-Month Plan$1.491 Month
  • 1-Quarter Plan$2.993 Months
  • 1-Year Plan$9.991 Year

Questions

Is Solution Dilution Calculator free?
Solution Dilution Calculator costs $2.99, with no in-app purchases.
Is Locker free?
Locker is free to download, with in-app purchases available.
Which has better reviews, Solution Dilution Calculator or Locker?
Solution Dilution Calculator and Locker are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Solution Dilution Calculator or Locker have ads?
Neither Solution Dilution Calculator nor Locker shows ads.
Which is updated more often, Solution Dilution Calculator or Locker?
Solution Dilution Calculator ships an update every 22 months, and Locker every 3 weeks. Most recently, Solution Dilution Calculator was updated on September 10, 2026 and Locker on September 5, 2026.

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