Comparison

(not)Guilty vs Addition Skill Builders

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

Head to head
About

(not)Guilty

Immerse yourself in a text-based RPG where you're wrongly accused and must survive a dangerous prison. Make critical decisions to uncover the truth, find the real killer, and prove your innocence through complex storylines with multiple endings.

Highlights
  • Text-based RPG
  • Interactive story choices
  • Multiple complex storylines
  • Branching narrative paths
  • Various ending scenarios
  • Interactive rating system
Features
Read full description

(not)Guilty - Interactive Mystery RPG Accused of a crime you didn’t commit, you’re sent to EDEN, one of the country’s most dangerous prisons. Can you survive, find the real killer, and prove your innocence? (not)Guilty is a choice-driven text RPG combining crime mystery, prison survival, and interactive fiction. Explore branching storylines, uncover secrets, and reach different endings. Every decision matters. PROVE YOUR INNOCENCE Trapped in EDEN, you face dangerous inmates, hidden motives, and betrayal. Survival comes first, but freedom requires more: follow the clues, discover the truth, and defend yourself in court. Who can you trust? Will you risk your safety to investigate? Your choices shape the story and determine how it ends. CHOOSE YOUR PATH Read carefully and make difficult decisions. Small details can lead to unexpected twists. Multiple story paths and endings invite you to explore different outcomes. GAME FEATURES * Interactive text-based RPG and mystery adventure * Original crime and prison survival story * Branching storylines and multiple endings * Choices that influence the narrative * Interactive rating system * Simple, minimalist interface * English and Russian language support * Three complete interactive stories Can you escape EDEN and clear your name? Download (not)Guilty and decide your fate. SUBSCRIPTION INFORMATION Name: not(Guilty) Package Duration: 1 month (auto-renewable) Included content: * guiltyStories2 * guiltyStories3 * guiltyStories4 * guiltyStories5 An active subscription provides access to the content included in the package. Additional stories may be added in the future; availability may change. PAYMENT AND RENEWAL The price is shown on the in-app purchase screen. Payment is charged to your Apple Account when you confirm your purchase. The subscription renews automatically unless canceled at least 24 hours before the current period ends. Your account will be charged for renewal within 24 hours before the end of that period. Manage or cancel your subscription in your Apple Account settings. After cancellation, access continues until the end of the paid period. If a free trial is offered, any unused portion may be forfeited when you purchase a subscription, where applicable. TERMS AND PRIVACY Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://ailabs.jp/en/terms Privacy Policy: https://ailabs.jp/en/policy

About

Addition Skill Builders

Features
Read full description

Improve your addition skills with Addition Skill Builders! Powered by natural handwriting input, this app transforms traditional practice into an engaging experience. It offers two modes: Math Trainer – a simple whiteboard where you can write your answers at your own pace. Math mini games – dive into 5 fun and engaging mini games with adaptive difficulty that challenge and motivate you at every level. With Addition Skill Builders you can practice and improve the following math skills: - Adding 1 - Adding 2 - Adding 3 - Adding 4 - Adding 5 - Adding 6 - Adding 7 - Adding 8 - Adding 9 - Adding 10

Screenshots

(not)Guilty3 screens
Addition Skill Builders4 screens

Verdict

The call

The clearest difference is price: (not)Guilty at Free against Addition Skill Builders's $2.99. (not)Guilty also leads on update cadence (every 3 weeks vs every 28 months). Addition Skill Builders's advantage is in-app purchases (none vs 5) and ads (none vs shown). On 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

(not)Guilty is free to download; Addition Skill Builders costs $2.99 up front. (not)Guilty sells 5 in-app purchases, starting at $0.49 per month. Addition Skill Builders asks for nothing beyond the download.

UpkeepUpdate frequency

(not)Guilty ships an update every 3 weeks, Addition Skill Builders every 28 months. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

Scorecard5 real differences · 5 level
(not)Guilty versus Addition Skill Builders: the parameters behind the verdict, then further details
Parameter(not)GuiltyAddition Skill Builders
PriceFree — better$2.99
Rating3.0 (3 ratings) — better—
Positive reviews16.1% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 weeks — betterEvery 28 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.612.0 — better
Further details — not scored
Size31 MB19 MB
Age rating9+4+
DeveloperTaigi AI Labs, LLCSergey Malugin

Bugs and requests

(not)Guilty

Reported bugs

7 issues
  • Game crashes after purchase
  • Game not opening
  • App crashes on specific devices
  • Choices ignored by the game
  • Incorrect responses to choices
Show 2 more
  • Storyline glitches
  • In-game purchases not working

Requested features

8 requests
  • More story variations
  • Improved writing and grammar
  • Better translation
  • Option to disable ads
  • More realistic choices
Show 3 more
  • Longer game duration
  • Saving progress
  • User-created stories

Addition Skill Builders

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

(not)Guilty

Subscriptions1
  • Unlock All Stories$0.491 Month
One-time4
  • (not)Guilty2 -Last Love-$0.99
  • (not)Guilty3 -Change Job-$0.99
  • not(Guilty)4 -GET THE CRONE-$0.99
Show 1 more
  • not(Guilty)5 -Labyrinth-$0.99
None

Addition Skill Builders

No in-app purchases

Questions

Is (not)Guilty free?
(not)Guilty is free to download, with in-app purchases available.
Is Addition Skill Builders free?
Addition Skill Builders costs $2.99, with no in-app purchases.
Do (not)Guilty or Addition Skill Builders have ads?
(not)Guilty shows ads; Addition Skill Builders does not.
Which is updated more often, (not)Guilty or Addition Skill Builders?
(not)Guilty ships an update every 3 weeks, and Addition Skill Builders every 28 months. Most recently, (not)Guilty was updated on October 16, 2026 and Addition Skill Builders on October 10, 2026.

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