# Timer Kit：Focus&Countdown vs Spool 3D Print Cost Calculator

The clearest difference is in-app purchases: Spool 3D Print Cost Calculator at none against Timer Kit：Focus&Countdown's 2. Spool 3D Print Cost Calculator also leads on update cadence (every 4 days vs every 3 months). Timer Kit：Focus&Countdown's advantage is iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Timer Kit：Focus&Countdown sells 2 in-app purchases, starting at $6.99 per 7 days. Spool 3D Print Cost Calculator asks for nothing beyond the download.

Timer Kit：Focus&Countdown ships an update every 3 months, Spool 3D Print Cost Calculator every 4 days. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Timer Kit：Focus&Countdown | Spool 3D Print Cost Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/spool-3d-print-cost-calculator/id6758672926/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 86.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 10 MB | 20 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SMJ Jewellery (HK) Limited](https://appshunter.io/developer/1721196677) | [Evgeny Kopytin](https://appshunter.io/developer/1171310326) |

## What reviewers say

### Timer Kit：Focus&Countdown

[App page](https://appshunter.io/ios/app/timer-kitfocus-and-countdown/id6747704566)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Week VIP | $6.99 | per 7 days |
| Year VIP | $39.99 | per year |


### Spool 3D Print Cost Calculator

[App page](https://appshunter.io/ios/app/spool-3d-print-cost-calculator/id6758672926)

Calculate the precise cost of your 3D prints, including materials, electricity, labor, and marketplace fees. Manage filament inventory, track printer wear, and analyze financial summaries for your projects. All data is stored locally on your device.

**Highlights:** Full financial breakdown, Multi-plate project management, Filament inventory tracking, Brand color catalogs, Printer cost and wear calculation, Flexible electricity tariffs, Usage statistics and insights

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Timer Kit：Focus&Countdown free?

Timer Kit：Focus&Countdown is free to download, with in-app purchases available.

### Is Spool 3D Print Cost Calculator free?

Spool 3D Print Cost Calculator is free to download, with no in-app purchases.

### Do Timer Kit：Focus&Countdown or Spool 3D Print Cost Calculator have ads?

Neither Timer Kit：Focus&Countdown nor Spool 3D Print Cost Calculator shows ads.

### Which is updated more often, Timer Kit：Focus&Countdown or Spool 3D Print Cost Calculator?

Timer Kit：Focus&Countdown ships an update every 3 months, and Spool 3D Print Cost Calculator every 4 days. Most recently, Timer Kit：Focus&Countdown was updated on October 7, 2026 and Spool 3D Print Cost Calculator on October 14, 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.*