# Shift Unit vs iStory

The clearest difference is rating: Shift Unit at 5.0 against iStory's 4.7. Shift Unit also leads on update cadence (every 2 months vs every 5 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Shift Unit holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 21 and 14 respectively.

Shift Unit ships an update every 2 months, iStory every 5 months. The most recent releases landed on September 6, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Shift Unit | iStory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (21 ratings)](https://appshunter.io/ios/app/shift-unit/id1514037983/reviews)** | [4.7 (14 ratings)](https://appshunter.io/ios/app/istory-your-device-timeline/id6471365579/reviews) |
| Number of ratings | **21** | 14 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 20 MB | 12 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Didier Burton](https://appshunter.io/developer/1514037982) | [Timelabs Ltd](https://appshunter.io/developer/1236402723) |

## What reviewers say

### Shift Unit

[App page](https://appshunter.io/ios/app/shift-unit/id1514037983)

This utility app offers precise unit and currency conversions with over 1400 units across 34 categories. It supports light/dark modes, home widgets, and an independent Apple Watch app. Features include a custom keypad with calculator mode and educational Wikipedia integration.

**Highlights:** 1400+ conversion units, 34 categories, Light/dark mode support, Home widget, Apple Watch app, Custom keypad with calculator, Wikipedia integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### iStory

[App page](https://appshunter.io/ios/app/istory-your-device-timeline/id6471365579)

Relive your digital history by exploring all the Apple devices you've owned and the memories captured with them. This app organizes your photos by device, provides insightful statistics, and allows you to export visual summaries of your tech journey.

**Highlights:** Device archive of owned Apple products, Photo timeline organized by device, Device and photo statistics, Exportable infographics, Offline use, Privacy-focused data collection

**In-app purchases:** none


## Frequently asked questions

### Is Shift Unit free?

Shift Unit is free to download, with no in-app purchases.

### Is iStory free?

iStory is free to download, with no in-app purchases.

### Which has better reviews, Shift Unit or iStory?

Shift Unit is rated higher. Shift Unit averages 5.0 out of 5 from 21 ratings, while iStory averages 4.7 from 14 ratings.

### Do Shift Unit or iStory have ads?

Neither Shift Unit nor iStory shows ads.

### Which is updated more often, Shift Unit or iStory?

Shift Unit ships an update every 2 months, and iStory every 5 months. Most recently, Shift Unit was updated on September 6, 2026 and iStory on September 10, 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.*