GachaSimulator vs Idle App Studio
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
GachaSimulator
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"Gacha Simulator" is an app that emphasizes simple and intuitive operation. Have you ever wondered why you never seem to win anything when pulling gacha in various games? If so, try your luck with "Gacha Simulator"! ・How to Use It's very simple. From the settings screen, choose your desired probability value and tap the capsule to start testing your luck. Before you begin, you'll need to configure the following two items: ・Mode To accommodate those who don’t like tapping repeatedly, the app offers three modes: 1. Normal Mode: Tap once to pull the gacha once. You can also long-press to pull repeatedly. 2. Fast Mode: Long-press to pull gacha continuously at high speed. 3. Instant Mode: Tap once to immediately pull until you hit a win. ・Probability Value Tap the settings button on the main screen to go to the settings page, then select your desired probability from the dropdown list. After selecting, press the “register” button at the top right to complete the setup. There are 11 preset probability values by default, but if the one you want to test isn’t listed, you can create your own on the settings screen. Enter a title name and the desired probability value, then tap the “Add to Title List” button. Your custom value will then appear in the dropdown list for selection. If you no longer need a custom title, you can also delete it by selecting it from the dropdown and tapping the delete button. Set your own preferred probability and try your luck today!
Idle App Studio
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Create your own app studio and turn a simple idea into a true digital empire! In Idle App Studio, you start with limited resources, but every line of code, every upgrade, and every new app brings you closer to success. Launch your projects, generate revenue, improve your tools, and grow your studio step by step. Even when you are not playing, your studio keeps making progress. Come back regularly to collect your earnings, unlock new upgrades, and expand your business. Features: • Develop apps and grow your studio • Earn money automatically with the idle system • Upgrade your tools, revenue, and productivity • Progress step by step through a simple and addictive experience • Build your own app empire Idle App Studio is an accessible idle game that is quick to learn and designed for anyone who enjoys progression, management, and continuous upgrade games. Launch your studio, code your first apps, and become the next great app creator! EULA: https://docs.google.com/document/d/1rVkXuX8cJxIby6jked9g7_CeMR6Dy3ad8kp1nsX0_t8/edit?usp=sharing Support: https://docs.google.com/document/d/1pcieoSc86whcXqk5Bt8GvQGfDC3EvEpMMa_mR9CpAsk/edit?usp=sharing
Screenshots
Verdict
The clearest difference is in-app purchases: GachaSimulator at none against Idle App Studio's 2. Idle App Studio's advantage is ads (none vs shown) and update cadence (every 2 days vs weekly). On price 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
Both are free to download. Idle App Studio sells 2 one-off in-app purchases. GachaSimulator asks for nothing beyond the download.
GachaSimulator ships an update weekly, Idle App Studio every 2 days. The most recent releases landed on September 9, 2026 and August 18, 2026 respectively.
| Parameter | GachaSimulator | Idle App Studio |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 23 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | YUSUKE KAJIWARA | DIMITRI DAVID |
In-app purchases
GachaSimulator
No in-app purchases
Idle App Studio
- Nuit blanche de code$0.99
- Café XXL$0.99





