Comparison

Image Alignment vs HP15C

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

Head to head

Classic Science Calc for you

$4.99

🔧 Utilities

★ 2.73 ratingsView app →

About

Image Alignment

Features

Read full description

Align the content of two images.

About

HP15C

Relive the classic computing experience with a vintage scientific calculator. This app emulates a beloved 90s model, offering a nostalgic and functional tool for calculations.

Highlights

Vintage scientific calculator emulation
Classic 90s design
Functional for scientific calculations
Nostalgic user experience

Features

Read full description

Vintage classic scientific calculator. The 90s are back baby! A really special person asked me to build this calculator as it was his favorite calculator, here it goes my dear. privacy policy: https://fermave.com Terms of service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

Image Alignment1 screens

HP15C4 screens

Verdict

The call

The clearest difference is price: Image Alignment at Free against HP15C's $4.99. Image Alignment also leads on update cadence (fortnightly vs every 6 months). HP15C's advantage is ads (none vs shown) and iOS requirement (15.6 vs 17.7.2). On 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

Image Alignment is free to download; HP15C costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Image Alignment ships an update fortnightly, HP15C every 6 months. The most recent releases landed on October 16, 2026 and October 21, 2026 respectively.

Scorecard4 real differences · 6 level

Image Alignment versus HP15C: the parameters behind the verdict, then further details
Parameter	Image Alignment	HP15C
Price	Free — better	$4.99
Rating	—	2.7 (3 ratings) — better
Positive reviews	—	33.3% of reviews
Number of ratings	—	3 — better
Update frequency	Fortnightly — better	Every 6 months
Ads	Yes	No — better
In-app purchases	No	No
Monetization	—	Paid
Devices	iPhone, iPad	iPhone, iPad, iPod — better
Requires iOS	17.7.2	15.6 — better
Further details — not scored
Size	84 MB	24 MB
Age rating	4+	4+
Developer	Hideaki Uchikoshi	FERMAVE

In-app purchases

None

Image Alignment

No in-app purchases

None

HP15C

No in-app purchases

Questions

Is Image Alignment free?

Image Alignment is free to download, with no in-app purchases.

Is HP15C free?

HP15C costs $4.99, with no in-app purchases.

Do Image Alignment or HP15C have ads?

Image Alignment shows ads; HP15C does not.

Which is updated more often, Image Alignment or HP15C?

Image Alignment ships an update fortnightly, and HP15C every 6 months. Most recently, Image Alignment was updated on October 16, 2026 and HP15C on October 21, 2026.