# Spill Calc vs FocusFlow Timer

The clearest difference is review sentiment: FocusFlow Timer at 50% against Spill Calc's 0%. FocusFlow Timer also leads on price (Free vs $2.99) and rating (5.0 vs 4.0). Spill Calc's advantage is in-app purchases (none vs 4) and chart position (#187 vs unranked). On ads, device support and iOS requirement there is nothing between them.

FocusFlow Timer is free to download; Spill Calc costs $2.99 up front. FocusFlow Timer sells 4 one-off in-app purchases. Spill Calc asks for nothing beyond the download.

FocusFlow Timer holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews point the same way: 0% of Spill Calc's written reviews are positive against 50% of FocusFlow Timer's.

Spill Calc ships an update every 31 months, FocusFlow Timer every 3 months. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Spill Calc | FocusFlow Timer |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/spill-calc-pro/id1554282536/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/focusflow-timer/id6745150820/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#187** | — |
| Size | 1 MB | 2 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [Nguyen Toan Le](https://appshunter.io/developer/1462706953) |

## What reviewers say

### Spill Calc

[App page](https://appshunter.io/ios/app/spill-calc-pro/id1554282536)

**Currently charting:** #187 Top Paid · Productivity (US App Store)

This app provides rapid, dependable spill volume estimations for field professionals. It calculates liquid volumes across various shapes and ground conditions, supporting mixed fluids and tank displacement for accurate reporting.

**Highlights:** Fast spill volume calculations, Multiple spill types supported, Mixed fluid calculations, Tank displacement accounting, Section-based spill tracking, Save and organize spill history, Export reports via text or email

**Features:** macOS Compatibility

**In-app purchases:** none


### FocusFlow Timer

[App page](https://appshunter.io/ios/app/focusflow-timer/id6745150820)

Boost productivity with a Pomodoro technique timer. Customize work and break durations, manage tasks, and track progress with detailed statistics and gamified achievements. Prevent burnout by balancing focused work with strategic rest.

**Highlights:** Customizable Pomodoro timer, Integrated task management, Detailed productivity statistics, Session history with notes, Gamified achievement system, Distraction-free interface with dark mode

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Coffee | $0.99 | one-time |
| Big Coffee | $2.99 | one-time |
| Lunch Money | $4.99 | one-time |
| Generous Support | $9.99 | one-time |


## Frequently asked questions

### Is Spill Calc free?

Spill Calc costs $2.99, with no in-app purchases.

### Is FocusFlow Timer free?

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

### Which has better reviews, Spill Calc or FocusFlow Timer?

FocusFlow Timer is rated higher. Spill Calc averages 4.0 out of 5 from 3 ratings, while FocusFlow Timer averages 5.0 from 1 ratings.

### Do Spill Calc or FocusFlow Timer have ads?

Neither Spill Calc nor FocusFlow Timer shows ads.

### Which is updated more often, Spill Calc or FocusFlow Timer?

Spill Calc ships an update every 31 months, and FocusFlow Timer every 3 months. Most recently, Spill Calc was updated on October 1, 2026 and FocusFlow Timer on September 30, 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.*