# Drill Calc vs Miles

The clearest difference is price: Miles at Free against Drill Calc's $2.99. Miles also leads on rating (5.0 vs 4.1) and update cadence (monthly vs every 18 months). Drill Calc's advantage is in-app purchases (none vs 1) and ratings volume (19 vs 4). On ads there is nothing between them.

Miles is free to download; Drill Calc costs $2.99 up front. Miles sells 1 one-off in-app purchase. Drill Calc asks for nothing beyond the download.

Miles holds the better App Store score, 5.0 against 4.1. Both are backed by a comparable volume of ratings — 19 and 4 respectively.

Drill Calc ships an update every 18 months, Miles monthly. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Drill Calc | Miles |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.1 (19 ratings)](https://appshunter.io/ios/app/drill-calc/id304434324/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/miles-car-maintenance-tracker/id6760646659/reviews)** |
| Number of ratings | **19** | 4 |
| Positive reviews | 91.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Monetization | Paid | **Free** |
| Size | 5 MB | 14 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Black Cat Systems](https://appshunter.io/developer/301047032) | [ADAM NICHOLAS NIEDZWIECKI](https://appshunter.io/developer/1860768362) |

## What reviewers say

### Drill Calc

[App page](https://appshunter.io/ios/app/drill-calc/id304434324)

This utility app helps you determine the correct drill bit size for threaded holes. It supports both inch and metric threads, calculates close and tight fit hole sizes, and provides tables for standard drill bit sizes and pipe information.

**Highlights:** Calculates drill bit size for threaded holes, Supports inch and metric threads, Displays close and tight fit hole sizes, Includes standard inch fractional and numeric drill bit tables, Provides pipe size information, Offers data on common wood screw sizes

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

**In-app purchases:** none


### Miles

[App page](https://appshunter.io/ios/app/miles-car-maintenance-tracker/id6760646659)

Easily track your vehicle's maintenance needs with service interval recommendations and detailed logging. Get smart reminders to prevent issues and maintain your car's longevity. Supports multiple vehicles and custom entries.

**Highlights:** Track unlimited vehicles, Recommended service intervals, Log maintenance records with photos, VIN scanner for quick entry, Smart mileage and time reminders, Maintenance timeline with PDF export, iCloud sync

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Miles Premium | $2.99 | one-time |


## Frequently asked questions

### Is Drill Calc free?

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

### Is Miles free?

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

### Which has better reviews, Drill Calc or Miles?

Miles is rated higher. Drill Calc averages 4.1 out of 5 from 19 ratings, while Miles averages 5.0 from 4 ratings.

### Do Drill Calc or Miles have ads?

Neither Drill Calc nor Miles shows ads.

### Which is updated more often, Drill Calc or Miles?

Drill Calc ships an update every 18 months, and Miles monthly. Most recently, Drill Calc was updated on October 31, 2026 and Miles on October 24, 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.*