# Sinkstack — Sinking funds tracker

> Sinking funds tracker (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/sinkstack/id6776308197 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Finance, Utilities
- Price: $0.99
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English
- Released: 2026-06-08
- Data updated: 2026-08-17
- User reviews in markdown: https://appshunter.io/ios/app/sinkstack/id6776308197/reviews.md

## What is Sinkstack?

Sinkstack is a simple sinking-funds envelope tracker for irregular expenses like insurance, gifts, repairs, fees, and renewals.

Create envelopes with a goal amount, current balance, monthly contribution, due date, and color. The dashboard shows how close each fund is and when it should be fully funded at the current pace.

Sinkstack is local-first and offline. No account, no ads, no analytics, no tracking, and no subscription are included.

## Chart rankings

- #122 in Top Paid · Finance (US App Store)


## Version history (last 5 releases)

### 2.3.1 — 2026-06-26

This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, plus small display fixes. iPhone is unchanged.

### 2.3 — 2026-06-21

Sinkstack 2.3 — a pro upgrade for your sinking funds, still 100% offline.

• Paycheck Allocator: split an incoming amount across every envelope by proportional, priority-waterfall, or even strategy — to the exact cent, never creating or losing a penny.
• Two-way What-If Solver: "reach my goal by this date → here's the monthly," or "at this rate → here's the finish date."
• Catch-Up Plans for any envelope that's fallen behind, spread over the periods you choose.
• Recurring bills that auto-reset: annual, semiannual, quarterly, or monthly funds roll over on their own.
• Insights roll-up: total monthly set-aside, 30/60/90-day cash needs, over/underfund counts with one-tap reclaim, and a monthly-net chart.
• Export a PDF statement.

No account, no bank links, no cloud — every number stays on your device.

### 2.2 — 2026-06-20

Introducing the This Month planner — see exactly how much to set aside this month, which funds are on pace, and which are behind, with a one-tap catch-up. Plus per-year breakdowns, a busiest-month view, and a full accessibility pass with Dynamic Type and VoiceOver.

### 2.1 — 2026-06-19

New Funding Calendar: a 12-month forward view of every envelope's cash-flow — how much to set aside each month, when bills come due, and which months are a "crunch." Plus stability hardening: ledger-authoritative balance reconciliation, ordered two-file persistence, locale-correct money parsing (no more $0 from a stray double-dot or $1250 from "12,50"), and a confirmation step before deleting a ledger entry.

### 2.0 — 2026-06-15

Sinkstack 2.0 is a major upgrade. Per-paycheck contributions (weekly, biweekly, semimonthly, monthly, quarterly, annual) with accurate projections; a due-date solver that calculates exactly how much to save each paycheck plus a catch-up amount; withdrawals and revolving funds that refill without erasing history; optional on-device due-date reminders (7/3/1 days ahead); 60+ starter templates across 12 categories; a balance-over-time chart on every envelope; editable envelopes; CSV export of all envelopes and the full ledger; a category-grouped dashboard with totals; and a 16-color palette. Still fully offline — no account, no ads, no tracking, no subscription.

## More apps by Robert Corbin

- [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266)
- [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175)
- [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447)
- [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025)
- [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719)
- [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879)

All apps by Robert Corbin: https://appshunter.io/developer/1890247992

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*