# SISTER 進發 vs GrindStack

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.

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.

## The numbers

| Metric | SISTER 進發 | GrindStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (7 ratings)](https://appshunter.io/ios/app/grindstack-live-poker-tracker/id6744820078/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 83.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | — | Freemium |
| Size | 18 MB | 73 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GT MARKET CONSULTING CO., LTD.](https://appshunter.io/developer/927846054) | [Jeremiah Moore](https://appshunter.io/developer/1695450531) |

## What reviewers say

### SISTER 進發

[App page](https://appshunter.io/ios/app/sister/id1198930609)

**Features:** macOS Compatibility

**In-app purchases:** none


### GrindStack

[App page](https://appshunter.io/ios/app/grindstack-live-poker-tracker/id6744820078)

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.

**Highlights:** Fast live game note-taking, Custom poker shorthand keyboard, Bankroll and session tracking, AI strategy insights, Hand history review and search, Player database building

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Subscription | $4.99 | per 7 days |
| Monthly Pro Membership | $10.99 | per month |
| Pro Annual Subscription | $99.99 | per year |


## Frequently asked questions

### Is SISTER 進發 free?

SISTER 進發 is free to download, with no in-app purchases.

### Is GrindStack free?

GrindStack is free to download, with in-app purchases available.

### Do SISTER 進發 or GrindStack have ads?

Neither SISTER 進發 nor GrindStack shows ads.

### Which is updated more often, SISTER 進發 or GrindStack?

SISTER 進發 ships an update every 5 weeks, and GrindStack every 2 months. Most recently, SISTER 進發 was updated on September 8, 2026 and GrindStack on September 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*