Comparison

Change Calculator vs DNAConverter

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

Head to head
About

Change Calculator

Quickly calculate the correct change to give for any transaction. Ideal for cashiers, small businesses, or personal use to ensure accuracy at the point of sale.

Highlights
  • Calculate change in seconds
  • Enter total bill amount
  • Tap amount paid
  • Immediate change display
  • Useful for sales and businesses
Features
Read full description

Change Calculator tells you what to hand back, the moment you tap the cash you were given. Made for the market stall, the yard sale, the bake sale and the school fair: anywhere you take cash without a till. It also works the other way round, so you can check that the cashier got it right. HOW IT WORKS 1. Type the bill. 2. Tap the coins and notes the customer handed you. 3. Read the change. The app also shows which coins and notes to give back. WHAT'S IN THE DRAWER • Over 150 currencies, each with its real coins and notes. The app starts with the currency of your device; switch with one tap. • Hide the denominations you never see, so your drawer matches your stall. • Undo a wrong tap, reset for the next customer, haptic feedback on every tap. • Dark mode, and a layout made for iPad. • Works completely offline. PRIVACY No ads, no accounts, no analytics. Nothing is tracked and nothing leaves your device. CHANGE PRO A single optional purchase that supports development and removes the occasional upgrade prompt. Everything else is included for everyone.

About

DNAConverter

Features
Read full description

Want to say something, but also… not really? This app lets you hide those feelings inside ATCG. If saying “thank you” directly feels awkward, or being honest feels too embarrassing, just convert your message into a DNA-style ATCG sequence with this app. ■Text → Nucleotide Sequence “Thank you” becomes something like TTTATCCATCATTCGCTCCGACAATGCTTCGGTGTT unnecessarily long and mysteriously meaningful! Send it to someone and they won’t understand a thing, but you can feel satisfied that you “expressed your gratitude.” ■Nucleotide Sequence → Text Even ATCG-only cryptic messages can be decoded back to the original text. Perfect for private “secret code” chats among friends. ■Features • Generates DNA-like sequences instantly, even though they mean nothing • Copy & paste into messaging apps for quick sharing • Decode mode for conversations only insiders can understand • Absolutely no biological meaning whatsoever Even the words you can’t say out loud might feel lighter when you hide them in ATCG.

Screenshots

Change Calculator4 screens
DNAConverter2 screens

Verdict

The call

The clearest difference is price: Change Calculator at Free against DNAConverter's $0.99. Change Calculator also leads on iOS requirement (17.0 vs 26.0). DNAConverter's advantage is in-app purchases (none vs 1) and update cadence (every 4 months vs every 32 months). On 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

Change Calculator is free to download; DNAConverter costs $0.99 up front. Change Calculator sells 1 one-off in-app purchase. DNAConverter asks for nothing beyond the download.

UpkeepUpdate frequency

Change Calculator ships an update every 32 months, DNAConverter every 4 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Change Calculator versus DNAConverter: the parameters behind the verdict, then further details
ParameterChange CalculatorDNAConverter
PriceFree — better$0.99
Rating2.6 (15 ratings) — better—
Positive reviews42.9% of reviews—
Number of ratings15 — better—
Update frequencyEvery 32 monthsEvery 4 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better26.0
Further details — not scored
Size1 MB1 MB
Age rating4+4+
DeveloperAlain Stulzmakoto amijima

In-app purchases

1 purchases

Change Calculator

One-time1
  • Change Pro$1.99
None

DNAConverter

No in-app purchases

Questions

Is Change Calculator free?
Change Calculator is free to download, with in-app purchases available.
Is DNAConverter free?
DNAConverter costs $0.99, with no in-app purchases.
Do Change Calculator or DNAConverter have ads?
Neither Change Calculator nor DNAConverter shows ads.
Which is updated more often, Change Calculator or DNAConverter?
Change Calculator ships an update every 32 months, and DNAConverter every 4 months. Most recently, Change Calculator was updated on November 4, 2026 and DNAConverter on November 3, 2026.

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