# FTB Mobile vs Sinkstack

The clearest difference is price: FTB Mobile at Free against Sinkstack's $0.99. FTB Mobile also leads on iOS requirement (12.2 vs 17.0). Sinkstack's advantage is update cadence (every 5 days vs every 13 months). On ads, in-app purchases and device support there is nothing between them.

FTB Mobile is free to download; Sinkstack costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FTB Mobile ships an update every 13 months, Sinkstack every 5 days. The most recent releases landed on October 13, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | FTB Mobile | Sinkstack |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[2.4 (40 ratings)](https://appshunter.io/ios/app/ftb-mobile/id1272359471/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 50 MB | 5 MB |
| Requires iOS | **12.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Franchise Tax Board](https://appshunter.io/developer/1058685410) | [Robert Corbin](https://appshunter.io/developer/1890247992) |

## What reviewers say

### FTB Mobile

[App page](https://appshunter.io/ios/app/ftb-mobile/id1272359471)

Check the status of your California state income tax refund. Make secure online tax payments directly from your bank account, with options to pay immediately or schedule for the future.

**Highlights:** Check refund status, Make online tax payments, Schedule future payments, Pay from bank account, No registration required

**Features:** macOS Compatibility

**In-app purchases:** none


### Sinkstack

[App page](https://appshunter.io/ios/app/sinkstack-paycheck-budget/id6776308197)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FTB Mobile free?

FTB Mobile is free to download, with no in-app purchases.

### Is Sinkstack free?

Sinkstack costs $0.99, with no in-app purchases.

### Do FTB Mobile or Sinkstack have ads?

Neither FTB Mobile nor Sinkstack shows ads.

### Which is updated more often, FTB Mobile or Sinkstack?

FTB Mobile ships an update every 13 months, and Sinkstack every 5 days. Most recently, FTB Mobile was updated on October 13, 2026 and Sinkstack on October 12, 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.*