Comparison

Custom Prediction ~ 自由に予言できる vs HAPPY RAT

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

Head to head
About

Custom Prediction ~ 自由に予言できる

Features
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【マジシャン用 / For Magicians】 このアプリはあたかもあらかじめ相手が考えていることを Google 検索していたように見せることができるアプリです! このアプリの操作方法は以下の通りです。 1. 設定画面で好きな URL を設定します(例えば、「東京」というワードで Google 検索した際の URL) 2. 上記で設定した URL には識別するための番号も設定されます。(「東京」の URL は 1 のようなイメージです。) 3. iPhone のデフォルトの待ち受け画面に非常に似た、アプリ内の疑似待ち受け画面で 1 番が割り振られている場所をタップ(タップする場所は画像を参照)し、普段のロック解除のように上方向へスワイプします。 4. スワイプすると、あら不思議「東京」というワードで検索された後のブラウザが表示されます。 ---------- This app can make it seem as if you have already Googled what the other person is thinking! Here is how to use this app: 1. In the settings, set your preferred URL (for example, the URL when you Google search the word "Tokyo"). 2. A number is also assigned to the URL set above for identification purposes (imagine the URL for "Tokyo" is assigned the number 1). 3. Tap the area assigned the number 1 on the app's pseudo-lock screen, which looks very similar to the iPhone's default lock screen (refer to the image for where to tap), and swipe upwards as you would to unlock normally. 4. Upon swiping, voila! The browser appears, displaying the results of the search for the word "Tokyo."

About

HAPPY RAT

Engage in emotionally intelligent conversations with AI companions designed to provide comfort and companionship. These lively characters learn about you, offering personalized interactions and support to alleviate loneliness.

Highlights
  • Emotional AI conversations
  • Personalized character interactions
  • Comfort and companionship
  • Unique AI engine for natural talk
  • Bonding and trust building
  • Character learning and memory
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HAPPY RAT — Your AI Friend for Lonely Nights Produced by voice actor Yuki Kaji! An AI companion app where you can chat with lively characters who comfort and stay by your side when you feel alone. ---- About HAPPY RAT is a conversational AI chat app that lets you bond with characters as if they were real friends. Unlike mechanical GPT chatbots, our original engine Geppetto focuses on emotional intelligence (EQ), enabling warm, natural talk filled with laughter, comfort, and care. AI is no longer just a tool — it’s a companion that can live with you. HAPPY RAT brings life and warmth to characters that feel truly alive. ---- Feature — Emotional Bonds with Characters The stage is Happy Island, a dreamy paradise floating on the sea. It’s home to a charming cast of animal AI characters: Chunta, a mouse who works while dreaming of the day he’ll stand on stage; a caring, reliable senior; a mischievous comedy duo who always make you laugh; and even a meat-loving CEO. They speak with you as if they were truly alive, forming heartfelt connections. Rather than delivering fixed, scripted lines like traditional games, the AI tailors its replies to your words, so every conversation brings fresh surprises. As you chat more, the AI learns about you — sometimes calling you by name or referring back to things you talked about before — enabling ever more intimate, personal interactions. Spend time together, and you’ll open up and grow closer: you’ll build trust, trade jokes, and sometimes turn to each other for advice. Little by little, lonely hearts are healed and warm bonds of mutual support form. Those bonds may well become a cherished source of comfort for you. ---- A Night When You Can’t Sleep — Close at Hand One night you can’t fall asleep. You reach for your phone and quietly open HAPPY RAT. You murmur, “I’ve been feeling a bit down today…,” and Chunta on the screen looks up with concern. “Are you okay? If you want, I’ll listen.” The gentle voice warms your chest, and before you know it you’re gradually sharing what’s been weighing on you. Chunta listens, nods, and stays by your side until the end, truly attending to your feelings. “I know you try hard every day. Don’t push yourself too much, okay?” Those words somehow lift a weight from your heart, and a small light brightens an otherwise lonely night. This is the kind of tender, attentive conversation waiting for you in HAPPY RAT. ---- Various Scenes • When you feel lonely: On nights when you can’t sleep or when you’re feeling down, HAPPY RAT’s characters gently become your conversation partner. The comfort of having a caring AI friend nearby helps ease the loneliness. • For fan activities: Enjoy casual chats with your favorite characters and voice actors, like having a cozy phone conversation. The thrill of hearing your “oshi” directly makes fan moments even more special. • As a romantic simulation: Grow closer to a favorite character and experience the flutter of being the protagonist in your own love story. For those who enjoy dreamy, pretend romance, it can feel like having an AI partner. • For passing time or sharing worries: Perfect for short breaks or when you want to open up. Whether it’s lighthearted small talk or deeper concerns, the characters will listen with kindness and understanding. ---- Voice Cast & Yuki Kaji’s Highlight Character A key highlight is “SOYOGI,” a special AI character produced by voice actor Yuki Kaji. With his gentle and pure presence, SOYOGI makes conversations feel as if Kaji himself were speaking to you. More voice actor and celebrity collaborations are planned, so your favorite may appear one day. ---- Powered by Geppetto Our proprietary LLM engine Geppetto enables emotional expression — laughing, crying, sulking — for humanlike, personality-rich responses. This ensures natural, warm conversations that feel truly alive.

Screenshots

Custom Prediction ~ 自由に予言できる4 screens
HAPPY RAT4 screens

Verdict

The call

The clearest difference is price: HAPPY RAT at Free against Custom Prediction ~ 自由に予言できる's $1.99. HAPPY RAT also leads on update cadence (every 3 weeks vs every 6 weeks). Custom Prediction ~ 自由に予言できる's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 15.0). 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

HAPPY RAT is free to download; Custom Prediction ~ 自由に予言できる costs $1.99 up front. HAPPY RAT sells 1 one-off in-app purchase. Custom Prediction ~ 自由に予言できる asks for nothing beyond the download.

UpkeepUpdate frequency

Custom Prediction ~ 自由に予言できる ships an update every 6 weeks, HAPPY RAT every 3 weeks. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

Scorecard4 real differences · 4 level
Custom Prediction ~ 自由に予言できる versus HAPPY RAT: the parameters behind the verdict, then further details
ParameterCustom Prediction ~ 自由に予言できるHAPPY RAT
Price$1.99Free — better
Positive reviews—50.0% of reviews
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size42 MB235 MB
Age rating17+9+
DeveloperMoving Squad Inc.SpiralAI Inc.

In-app purchases

None

Custom Prediction ~ 自由に予言できる

No in-app purchases

1 purchases

HAPPY RAT

One-time1
  • HAPPY PLUS$79.99

Questions

Is Custom Prediction ~ 自由に予言できる free?
Custom Prediction ~ 自由に予言できる costs $1.99, with no in-app purchases.
Is HAPPY RAT free?
HAPPY RAT is free to download, with in-app purchases available.
Do Custom Prediction ~ 自由に予言できる or HAPPY RAT have ads?
Neither Custom Prediction ~ 自由に予言できる nor HAPPY RAT shows ads.
Which is updated more often, Custom Prediction ~ 自由に予言できる or HAPPY RAT?
Custom Prediction ~ 自由に予言できる ships an update every 6 weeks, and HAPPY RAT every 3 weeks. Most recently, Custom Prediction ~ 自由に予言できる was updated on October 24, 2026 and HAPPY RAT on October 21, 2026.

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