Diffy Theme Tools vs Theme Upgrade Buddy
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for Diffy Theme Tools, Feb 19, 2026 for Theme Upgrade Buddy.
The short answer
Head to head
Compare Themes and Run Diff Checks Easily
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Complete
- · Compare Any or All Files
- · Compare Unlimited Themes
- · Keyword Search
- · Theme Backups
- · Theme History
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureSearch themes and search files for keywords in any of your themes with ease. Backup themes automatically. Track theme file changes over time. Compare themes for file differences (diff checks). Download a file or complete theme from any point in time. Click to go right to the Theme Editor. View file changes from one version to the next. View when a theme was published.
When you upgrade your Shopify theme version, custom code and styles may differ between versions. This app compares your current theme with a new version and shows every difference. Works with ANY theme, not just specific vendors. Files are grouped by risk level so you know what needs attention first. Review changes in a side-by-side diff viewer, copy custom code with one click, and download a report.
- Compare Shopify themes files fast, find differences and changes.
- Theme file backup and downloads from any point in time, even after deletion.
- Search themes for keywords or code in your theme files easily and save time.
- Track changes in theme files and actions such as publishing.
- Compare any two themes and instantly see every difference between them
- Side-by-side code viewer highlights exactly what changed in each file
- Files sorted by risk level so you tackle critical changes first
- Download a full report to track progress and share with your team
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Diffy Theme Tools |  Theme Upgrade Buddy |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Diffy Theme Tools | Theme Upgrade Buddy |
|---|---|---|
| App Store rating | 4.7 ★ | Not published |
| App Store reviews | 7 | Not published |
| New reviews, 28 days | 0 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Diffy Theme Tools | Theme Upgrade Buddy |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $9.99/month | No monthly plan listed |
| Longest free trial | 30 days | Not listed |
| Plans listed | 1 | Not published |
Listing
| Measure | Diffy Theme Tools | Theme Upgrade Buddy |
|---|---|---|
| Shopify category rank | #69 | #120 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Aug 7, 2020 | Jan 1, 2026 |
| Languages | 19 | 1 |
| Developer | Immersive Ecommerce | HASAN ARMSTRONG LLC |
FAQ
Diffy Theme Tools and Theme Upgrade Buddy: common questions
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 13, 2026 for Diffy Theme Tools, Feb 19, 2026 for Theme Upgrade Buddy; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 13, 2026 for Diffy Theme Tools, Feb 19, 2026 for Theme Upgrade Buddy. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.