# DuctSizer vs Spiki

The clearest difference is price: Spiki at Free against DuctSizer's $4.99. DuctSizer's advantage is in-app purchases (none vs 10) and update cadence (every 4 days vs fortnightly). On ads there is nothing between them.

Spiki is free to download; DuctSizer costs $4.99 up front. Spiki sells 10 in-app purchases, starting at $39.99 per month. DuctSizer asks for nothing beyond the download.

DuctSizer ships an update every 4 days, Spiki fortnightly. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | DuctSizer | Spiki |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spiki-real-time-translator/id6749565733/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Fortnightly |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 57 MB | 70 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mulberrysoft](https://appshunter.io/developer/1612779919) | [Altgo Tech](https://appshunter.io/developer/1564211503) |

## What reviewers say

### DuctSizer

[App page](https://appshunter.io/ios/app/ductsizer/id6467117263)

This utility app provides a quick and accurate ductulator for calculating equivalent round and rectangular duct sizes. It supports both Imperial and SI units, offering a simple finger-slide interface for fast computations.

**Highlights:** Quick duct size calculations, Accurate results, Equivalent round and rectangular sizes, IP and SI unit support, Finger slide interface

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

**In-app purchases:** none


### Spiki

[App page](https://appshunter.io/ios/app/spiki-real-time-translator/id6749565733)

Instantly translate spoken or typed words to break down language barriers. This tool offers live subtitles, voice playback, and the ability to save and share conversations, making communication seamless for travel, work, or making new friends.

**Highlights:** Instant spoken and typed translation, Live subtitles and voice playback, Save and share conversations, Supports multiple languages, User-friendly interface

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $39.99 | per month |
| Annual Subscription | $239.99 | per year |
| 1 Day (Discount) | $0.99 | one-time |
| 30-minutes Pack | $1.99 | one-time |
| 60-minutes Pack | $2.99 | one-time |
| 1 Day | $2.99 | one-time |
| 120-minutes Pack | $3.99 | one-time |
| 3 Day | $6.99 | one-time |
| 300-minutes Pack | $8.99 | one-time |
| 7-Day Pack | $13.99 | one-time |


## Frequently asked questions

### Is DuctSizer free?

DuctSizer costs $4.99, with no in-app purchases.

### Is Spiki free?

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

### Do DuctSizer or Spiki have ads?

Neither DuctSizer nor Spiki shows ads.

### Which is updated more often, DuctSizer or Spiki?

DuctSizer ships an update every 4 days, and Spiki fortnightly. Most recently, DuctSizer was updated on October 14, 2026 and Spiki on October 1, 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.*