SISTER 進發 vs GrindStack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SISTER 進發
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As a professional machine center supplier, we have held the business spirit of “High Speed Cutting, High Quality, Express Service, and Customer First” and it has made SISTER a trusted cutting partner since the founding of SISTER Machine Technology Co., Ltd. in October of 2006. We have carried a wide range of machining centers, such as high speed machine center, vertical machine center, CNC vertical machining center, double column high speed machine center, double column machine, graphite machine center… To help customers increase productivity and maximize their ability to compete, SISTER’s team continuously searches for new technology in the rapid developing Machine Tool Industry and strives to provide top-class quality and services.
GrindStack
This app helps serious poker players track live game hands, opponent tendencies, and bankroll. It features a specialized keyboard for fast note-taking and AI-powered strategy insights. Analyze your game and build a player database to gain a competitive edge.
- Fast live game note-taking
- Custom poker shorthand keyboard
- Bankroll and session tracking
- AI strategy insights
- Hand history review and search
- Player database building
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Stop guessing and start grinding. GrindStack is the ultimate live poker tracker, bankroll log, and AI-powered strategy coach built for serious cash game and tournament players. Never forget a hand again. Log live action in seconds with our custom poker shorthand keyboard, track opponent tells, and turn raw session data into actionable analytics. Wondering how to track poker hands effectively at the table? GrindStack transforms your notes into a structured study database. Find your leaks, analyze Texas Holdem hands, and elevate your live game strategy. KEY FEATURES: • Quick Hand History Logging: Built for fast-paced casino action. • Interactive Bankroll Manager: Track your hourly win rates and trends. • AI Poker Coach: Instantly analyze your decisions and find leaks. • Opponent Notes: Keep a secure database of player tells and styles. Download GrindStack today, find your leaks, and boost your win rate. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: SISTER 進發 at none against GrindStack's 3. SISTER 進發 also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, 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
Both are free to download. GrindStack sells 3 in-app purchases, starting at $4.99 per 7 days. SISTER 進發 asks for nothing beyond the download.
SISTER 進發 ships an update every 5 weeks, GrindStack every 2 months. The most recent releases landed on September 8, 2026 and September 9, 2026 respectively.
| Parameter | SISTER 進發 | GrindStack |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.4 (7 ratings) — better |
| Positive reviews | — | 83.3% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 18 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | GT MARKET CONSULTING CO., LTD. | Jeremiah Moore |
In-app purchases
SISTER 進發
No in-app purchases
GrindStack
- Weekly Pro Subscription$4.997 Days
- Monthly Pro Membership$10.991 Month
- Pro Annual Subscription$99.991 Year
