Comparison

Amnesia vs Calc

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

Head to head
About

Amnesia

Awaken with no memory and a spirit guide to help you. Explore relationships and uncover your past through branching storylines and character interactions. Each chapter offers a new path to discover your lost identity.

Highlights
  • Memory loss storyline
  • Branching narrative paths
  • Multiple romantic interests
  • Character-driven story
  • Visual novel gameplay
  • Unlockable scenarios
Features
Read full description

The Normal Edition is available to download for free. The Prologue is playable for free and each chapter costs an additional. The new scenario is available upon purchase of all main episodes. It is the 1st of August. Upon awakening, you find yourself without any memories from before August 1st. Everything, from the sort of life you lived to the relationships you had, is a complete blank. A young boy named Orion appears in front of you, revealing himself to be a spirit attached to your mind. Under Orion's guidance, you begin the struggle to regain your memories... Blunt ∙ Earnest - Heart - Shin (VA: Tetsuya Kakihara) Your childhood friend and current boyfriend. He is only 18 years old, but has a very serious and cold demeanor that frequently causes conflicts with others his age. Oftentimes, he appears aloof and indifferent, but he is actually very affectionate and cares deeply for you. He is a senior in high school, and is currently preparing for university entrance exams. He is also Toma's childhood friend. Alluring ∙ Fascinating - Spade - Ikki (VA: Kisho Taniyama) Ikki has a unique condition that causes women to become enamored with him upon sight. He is 22 years old and is currently enrolled in a nearby university. Having given up on a genuine relationship, he lives the life of a playboy, indulging in the transient pleasures it brings. However, he becomes very close to you after he discovers his “eyes” have no effect on your emotions toward him. Despite his looks and popularity, Ikki is really a kind and sincere man. He is a good friend of Kent’s, a graduate student who attends the same university. Cool ∙ Logical - Clover - Kent (VA: Akira Ishida) A highly intelligent, 25-year-old mathematics graduate student, Kent sees the world from a purely objective point of view. He is normally very confident in his convictions and in the results of his relentless analysis of others; however, it seems as if he is unable to maintain the same composure when he is around you. His tendency to logically dissect every action makes him a difficult companion, especially among females. He is a good friend of Ikki’s, who competes with him in solving overly complex math puzzles. Affectionate ∙ Intense - Diamond - Toma (VA: Satoshi Hino) Toma is a 20-year-old law student at the university you both attend. Being your oldest friend from childhood, he has naturally assumed the role of your big brother. Toma has always kept an eye on you from a close distance, and takes on the responsibility of caring for you after you collapse on the road outside of your apartment. His desire to protect you is extremely strong, to the point that his mental state can become unpredictable... He is also a childhood friend of Shin’s. Mysterious ∙ Enigmatic - Joker - Ukyo (VA: Kouki Miyata) A strange young man who appears unexpectedly. He gives you mysterious warnings, and disappears again without explanation. Whether he wants to protect you or harm you is unclear. Friend ∙ Protector Orion (VA: Yumi Igarashi) A spirit from a distant world. His outward appearance looks to the human eye as a 10-year-old boy. On his way to run a short errand in the human world, he crashes into you and becomes trapped inside your mind. He supports you in order to fulfill your mutual goal of regaining your memories. - How to Play After the opening movie, the title screen will be shown. To play a new game, select “NEW GAME.” To continue your current game, select “CONTINUE.” If you’d like to select another story, select “CHAPTER.” After clearing the prologue, four different stories will become available.

About

Calc

This app adds a fun, interactive calculator experience with cute character reactions and customizable designs. It also features a unique 'Performance Mode' for playing music and hidden 'SP Answer Actions' for special character responses.

Highlights
  • Cute character reactions with button presses
  • Customizable calculator themes
  • Performance Mode for music playback
  • Hidden SP Answer Actions
  • Paid character DLCs available
  • Voice lines for each character
Features
Read full description

A little more joy in your calculations, every day. Desktop Mate now has a sister app! Calculator - Desktop Mate Widgets is a digital calculator you can use with your favorite characters — and the first release in the new Desktop Mate Widgets series. ■ Enjoy Cute Character Reactions Every time you press a calculator button, the character will speak that number and strike a pose. Press "=" to get the answer — though sometimes they might struggle a little to figure it out! Pet or poke the character's head for special reactions too. Enjoy your favorite character's movements and expressions as you calculate. ■ Customize with Character-Themed Designs Swap out the calculator buttons and background to match your character's style. Each character comes with multiple design options, so you can mix and match to suit your mood or the moment. ■ Performance Mode: Play Music on Your Calculator! Tap the music note button to switch from calculator mode to Performance Mode. The calculator keys function like piano keys, and the character will sing along to whatever you press. Hold "+" or "-" to shift notes by a semitone, and multi-key presses are supported too. With a little practice, you might be able to pull off a real performance! Share your session on social media and enjoy it with everyone. ■ SP Answer Actions: Find the Hidden Numbers Certain calculation results trigger special character reactions. From a triple "777" to fun number combinations, each character also has their own unique numbers that set off a special response. See how many hidden reactions you can find! ■ Ready to Use Right Away: Aieru-tan Launch the app and you're ready to go with Aieru-tan, the official mascot character of infiniteloop. Aieru-tan is a 16-year-old high school student who works part-time at infiniteloop. She loves programming and gaming, and her occasionally sharp tongue is all part of her charm. Since her debut in 2012, she has appeared in Desktop Mate and many other projects as a beloved face of infiniteloop. ■ More Character DLCs for a More Personal Experience This app also offers paid additional character DLC. The "Hatsune Miku DLC" will be available at launch, with more characters to be added over time in step with the Desktop Mate series lineup. Each DLC features newly recorded voice lines tailored to each character, so you can enjoy your favorite character's voice and reactions every time you use the calculator. More characters will be added over time, in line with the Desktop Mate series lineup. And this is just the beginning — more Desktop Mate Widgets apps are on the way. Stay tuned! Note: When using additional character DLC, please also review the guidelines set by each character's rights holder.

Screenshots

Amnesia4 screens
Calc4 screens

Verdict

The call

The clearest difference is update cadence: Calc at weekly against Amnesia's every 14 months. Calc also leads on review sentiment (77% vs 48%). Amnesia's advantage is iOS requirement (10.0 vs 15.0). 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. Amnesia sells 10 one-off in-app purchases and Calc sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.2 for Amnesia against 4.1 for Calc. Both are backed by a comparable volume of ratings — 116 and 50 respectively. Written reviews are what separate them: 48% of Amnesia's written reviews are positive against 77% of Calc's.

UpkeepUpdate frequency

Amnesia ships an update every 14 months, Calc weekly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
Amnesia versus Calc: the parameters behind the verdict, then further details
ParameterAmnesiaCalc
PriceFreeFree
Rating4.2 (116 ratings) — better4.1 (50 ratings)
Positive reviews47.9% of reviews77.1% of reviews — better
Number of ratings116 — better50
Update frequencyEvery 14 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS10.0 — better15.0
Further details — not scored
Size1.4 GB156 MB
Age rating17+4+
DeveloperIDEA FACTORY CO., LTD.インフィニットループ

Customer experience

Amnesia

All ratings118 ratings
Positive75.4%
Neutral8.5%
Negative16.1%
Written reviews94 reviews
Positive47.9%
Neutral17.0%
Negative35.1%

Calc

All ratings46 ratings
Positive73.9%
Neutral10.9%
Negative15.2%
Written reviews70 reviews
Positive77.1%
Neutral7.1%
Negative15.7%

Bugs and requests

Amnesia

Reported bugs

7 issues
  • Black screen after intro on iOS 10+ (widespread issue affecting many users)
  • App crashes before loading main menu
  • App won't download on some devices
  • Screen freezes and crashes during gameplay
  • App stops working after updating iOS
Show 2 more
  • No sound and black screen after introduction
  • App crashes when accessing purchased chapters

Requested features

9 requests
  • Free or discounted chapters for initial gameplay
  • In-game currency earned through mini-games or tapping
  • Ability to replay completed endings without replaying entire story
  • Orion romance route
  • Sequel games (Amnesia Later, New World) on mobile
Show 4 more
  • More Idea Factory games in English on mobile (Diabolik Lovers, Collar x Malice)
  • Bundle purchase option for all chapters at once
  • Cross-device purchase recognition
  • Smaller app file size

Calc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Amnesia

One-time10
  • Heart World Chapter 1$3.79
  • Heart World Chapter 2$3.79
  • Heart World Chapter 3$3.79
Show 7 more
  • Spade World Chapter 1$3.79
  • Clover World Chapter 1$3.79
  • Clover World Chapter 2$3.79
  • Clover World Chapter 3$3.79
  • Diamond World Chapter 1$3.79
  • Diamond World Chapter 2$3.79
  • Joker World Chapter 1$3.79
10 purchases

Calc

One-time10
  • Kasane Teto$2.99
  • Zundamon$2.99
  • Koharu Rikka$2.99
Show 7 more
  • Natsuki Karin$2.99
  • Additional Character MEIKO$2.99
  • Additional Character KAITO$2.99
  • Additional Character Kagamine Rin$2.99
  • Additional Character Kagamine Len$2.99
  • Additional Character Megurine Luka$2.99
  • Additional Character Hatsune Miku$2.99

Questions

Is Amnesia free?
Amnesia is free to download, with in-app purchases available.
Is Calc free?
Calc is free to download, with in-app purchases available.
Which has better reviews, Amnesia or Calc?
Amnesia is rated higher. Amnesia averages 4.2 out of 5 from 116 ratings, while Calc averages 4.1 from 50 ratings.
Do Amnesia or Calc have ads?
Neither Amnesia nor Calc shows ads.
Which is updated more often, Amnesia or Calc?
Amnesia ships an update every 14 months, and Calc weekly. Most recently, Amnesia was updated on November 1, 2026 and Calc on November 5, 2026.

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