Comparison

FTB Mobile vs Sinkstack

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Check refund status
  • Make online tax payments
  • Schedule future payments
  • Pay from bank account
  • No registration required
Features
Read full description

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.

About

Sinkstack

Features
Read full description

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

FTB Mobile4 screens
Sinkstack3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
FTB Mobile versus Sinkstack: the parameters behind the verdict, then further details
ParameterFTB MobileSinkstack
PriceFree — better$0.99
Rating2.4 (40 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings40 — better—
Update frequencyEvery 13 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.2 — better17.0
Further details — not scored
Size50 MB5 MB
Age rating4+4+
DeveloperFranchise Tax BoardRobert Corbin

In-app purchases

None

FTB Mobile

No in-app purchases

None

Sinkstack

No in-app purchases

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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