Comparison

Conversions vs Lumenus Vault

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

Head to head
About

Conversions

Easily convert over 100 units across various categories like temperature, length, and weight. View conversion formulas, copy results, and share them directly. Enjoy a private, ad-free experience with a native iOS design.

Highlights
  • Convert 100+ units
  • Temperature, length, weight conversions
  • View conversion formulas
  • Copy and share conversions
  • Native iOS design
  • Ad-free experience
Features
Read full description

Conversions helps you convert different units of measurement, including units of temperature, length, or weight. Use Conversions to convert common measures, such as Fahrenheit to Celsius, meters to feet, and pounds to kilograms, or more technical ones, such as Joule to Kilowatt Hour, Newton to Pound-Force, and Pascal to Bar. Features: · Convert over 100 units across categories like angle, area, data, energy, force, length, power, pressure, speed, temperature, time, volume, and weight · Keep track of up to 100 of your recent conversions · Save up to 25 favorites for quick access · View the exact formulas behind each conversion · Look up unit details, including symbols, measurement systems, and conversion formulas for related units · Copy your conversions to clipboard or share directly with others · Enjoy a native iOS design, using Apple’s latest frameworks and UI guidelines Conversions provides a private and secure, ad-free experience—no ads, no tracking, ever. Terms of Service: https://crater.tools/conversions/terms-of-service Privacy Policy: https://crater.tools/conversions/privacy-policy

About

Lumenus Vault

Read full description

Lumenus is a minimalist info inbox that relieves information anxiety. It supports instant collection of voice, images and random ideas, and sorts out scattered content intelligently via AI. Free of redundant functions and distractions, it delivers a pure clean experience for easy centralized information gathering.

Screenshots

Conversions4 screens
Lumenus Vault4 screens

Verdict

The call

The clearest difference is update cadence: Conversions at every 2 weeks against Lumenus Vault's every 5 months. Lumenus Vault's advantage is iOS requirement (16.6 vs 18.6). On price, ads, in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Conversions ships an update every 2 weeks, Lumenus Vault every 5 months. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

Scorecard2 real differences · 8 level
Conversions versus Lumenus Vault: the parameters behind the verdict, then further details
ParameterConversionsLumenus Vault
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS18.616.6 — better
Further details — not scored
Size6 MB32 MB
Age rating4+4+
DeveloperPiotr Bakker萍 公

In-app purchases

None

Conversions

No in-app purchases

None

Lumenus Vault

No in-app purchases

Questions

Is Conversions free?
Conversions is free to download, with no in-app purchases.
Is Lumenus Vault free?
Lumenus Vault is free to download, with no in-app purchases.
Do Conversions or Lumenus Vault have ads?
Neither Conversions nor Lumenus Vault shows ads.
Which is updated more often, Conversions or Lumenus Vault?
Conversions ships an update every 2 weeks, and Lumenus Vault every 5 months. Most recently, Conversions was updated on October 21, 2026 and Lumenus Vault on October 18, 2026.

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