FTB Mobile vs Sinkstack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FTB Mobile
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.
- Check refund status
- Make online tax payments
- Schedule future payments
- Pay from bank account
- No registration required
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The FTB Mobile App is an official app of the Franchise Tax Board. Refund Status Check the refund status of your California state income tax return. Make a Payment Use Web Pay to pay your taxes online from your bank account. No registration required. Pay today or schedule payments up to one year in advance.
Sinkstack
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Payday Bridge projects a dated cash pool so you can see shortfalls before payday, even when the period ends with money left over. HOW IT WORKS 1. Open Payday Bridge from the dashboard. Enter an opening cash amount, desired buffer and 1–90 day horizon, or explore the labeled example. 2. Add dated income and payments. Mark uncertain income, then compare the entered baseline with uncertain income excluded or all paydays delayed by up to 14 days. 3. Inspect the lowest daily closing balance, same-day posting-order sensitivity and exact daily ledger. Save the plan and share its dates and assumptions. Envelope tracking, recurring schedules, Funding Calendar, paycheck allocation, catch-up planning, statements and existing scenario tools remain available. Saved plans preserve exact cents; failed writes keep the previous in-memory state and corrupt files are preserved. WHAT TO KNOW Manual USD planning for one cash pool, with up to 200 entries per plan and 50 saved plans. Amounts are stored as integer cents. Payments-before-income assumes all same-day outgoings precede incoming cash; actual posting order is unknown. Delayed income beyond the horizon is reported separately. No bank account is connected and no payments or envelope-balance changes occur. Include all obligations and avoid counting envelope transfers and their eventual bills twice. iPhone and iPad.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | FTB Mobile | Sinkstack |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 2.4 (40 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 40 — better | — |
| Update frequency | Every 13 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.2 — better | 17.0 |
| Further details — not scored | ||
| Size | 50 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Franchise Tax Board | Robert Corbin |
In-app purchases
FTB Mobile
No in-app purchases
Sinkstack
No in-app purchases









