# Trig Instruments Toolbox vs Days Counter (Countdown Days)

The clearest difference is in-app purchases: Trig Instruments Toolbox at none against Days Counter (Countdown Days)'s 1. Trig Instruments Toolbox also leads on ads (none vs shown). Days Counter (Countdown Days)'s advantage is update cadence (every 5 weeks vs every 27 months) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Days Counter (Countdown Days) sells 1 one-off in-app purchase. Trig Instruments Toolbox asks for nothing beyond the download.

Trig Instruments Toolbox ships an update every 27 months, Days Counter (Countdown Days) every 5 weeks. Both last shipped on October 7, 2026.

## The numbers

| Metric | Trig Instruments Toolbox | Days Counter (Countdown Days) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/trig-instruments-toolbox/id1467103926/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 27 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 54 MB | 31 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Stevens Marketing Limited](https://appshunter.io/developer/1467103925) | [庆鸿 林](https://appshunter.io/developer/1558629938) |

## What reviewers say

### Trig Instruments Toolbox

[App page](https://appshunter.io/ios/app/trig-instruments-toolbox/id1467103926)

This utility app provides a collection of essential field tools, including a ratio to angle converter, inclinometer, tally counter, and protractor. It leverages your device's sensors for accurate estimations and calculations, reducing the need to carry multiple physical instruments.

**Highlights:** Ratio to Angle converter, Inclinometer, Tally counter, Protractor, Uses device sensors for accuracy, New free tools added regularly

**Features:** macOS Compatibility

**In-app purchases:** none


### Days Counter (Countdown Days)

[App page](https://appshunter.io/ios/app/days-counter-countdown-days/id1587592197)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Membership | $9.99 | one-time |


## Frequently asked questions

### Is Trig Instruments Toolbox free?

Trig Instruments Toolbox is free to download, with no in-app purchases.

### Is Days Counter (Countdown Days) free?

Days Counter (Countdown Days) is free to download, with in-app purchases available.

### Do Trig Instruments Toolbox or Days Counter (Countdown Days) have ads?

Days Counter (Countdown Days) shows ads; Trig Instruments Toolbox does not.

### Which is updated more often, Trig Instruments Toolbox or Days Counter (Countdown Days)?

Trig Instruments Toolbox ships an update every 27 months, and Days Counter (Countdown Days) every 5 weeks. Most recently, Trig Instruments Toolbox was updated on October 7, 2026 and Days Counter (Countdown Days) on October 7, 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.*