Side-by-side comparison · 24 data points
Send tracked emails from the official Gmail™ app on iOS and Android. The only email tracker that works inside the Gmail app. By Mailtrack®.
| Mailtrack® | Slemma | |
|---|---|---|
| Tagline | ||
| Description | ||
| Screenshots | images | images |
| Languages | ||
| Platforms | ||
| Developer | ||
| Listed | — | — |
| Last updated | — | — |
| Metric | Mailtrack®: Email Tracker for the Gmail™ App | Slemma |
|---|---|---|
| Rating | ★ 4.1 ★ | 3.7 ★ |
| Total reviews | ★ 15k | 92 |
| Active installs | 3,171,243+ | 1,769,231+ |
| Free plan | ★ Yes | — |
| Pricing | Free of charge with paid features | Not available |
Based on the data on this page, Mailtrack®: Email Tracker for the Gmail™ App is the stronger choice for most Google Workspace Marketplace admins — 4.1★ vs Slemma's 3.7★ is a meaningful gap that usually reflects real product or support quality differences across the user base.
On pricing, Mailtrack®: Email Tracker for the Gmail™ App offers a free tier (Free of charge with paid features) while Slemma starts at Not available. For early-stage teams validating fit, the free-tier path lets you run the app on real workloads before committing budget.
Mailtrack®: Email Tracker for the Gmail™ App has the larger user base (15,283 reviews vs 92), which usually maps to broader integration coverage, faster bug-fix cadence, and a deeper bench of community workflow patterns. Slemma's smaller cohort can be an advantage for niche workflows where the bigger app has accumulated bloat.
Recommended by size: small/early-stage admins who need fast install and low risk should default to Mailtrack®: Email Tracker for the Gmail™ App; mid-market and enterprise admins with specific feature requirements should evaluate both — Slemma's 92-review base may include the workflow context that matches your specific use case better than Mailtrack®: Email Tracker for the Gmail™ App's broader-but-shallower coverage.
This verdict is generated from the live marketplace data on this page — rating, review count, pricing tier, and category position all refresh from the canonical Google Workspace Marketplace listing every 24 hours. AppRanks does not accept payment to influence comparison outcomes; the methodology is documented on the About page and applies identically to every pair on the site.
Read each app's audit: Mailtrack®: Email Tracker for the Gmail™ App audit • Slemma audit
| Keyword | Mailtrack® | Slemma |
|---|---|---|
| chatbots | #24 | Not ranked |
| project | #27 | Not ranked |
No tracked changes.
Mailtrack®: Email Tracker for the Gmail™ App is the cheaper option — it offers a free plan (Free of charge with paid features). Slemma starts at Not available. Both publish their pricing on the Google Workspace Marketplace; AppRanks mirrors what's listed on each refresh cycle.
Mailtrack®: Email Tracker for the Gmail™ App has the higher average rating (4.1★ from 15,283 reviews) compared to Slemma (3.7★ from 92 reviews). Both are tracked daily by AppRanks, so the figures here update each refresh cycle.
Mailtrack®: Email Tracker for the Gmail™ App holds the higher average rating (4.1★ vs 3.7★). That is the one dimension AppRanks can separate them on here — read both apps' detail pages for the feature breakdown and recent listing changes.
Both apps are one-click installs from the Google Workspace Marketplace. Mailtrack®: Email Tracker for the Gmail™ App has the deeper published review base (15,283 vs 92), which often — though not always — accompanies better-tested setup docs. AppRanks doesn't measure setup time directly: read the recent reviews on each app's detail page for user-reported install experience.
Mailtrack®: Email Tracker for the Gmail™ App typically suits established teams with steady usage based on its published review base (15,283 reviews). Slemma typically suits early-stage and growth-mode teams based on its published review base (92 reviews). A larger review base generally means the app has been exercised at scale — relevant if you are processing high volume or handling enterprise compliance requirements.
Migration support varies by app and category. Mailtrack®: Email Tracker for the Gmail™ App and Slemma both publish their export options on their marketplace listing pages (or in their support docs); some apps offer one-click import from competitors, others require CSV. The fastest check: search "import from Slemma" in each app's help center. AppRanks does not track migration tooling directly — this is a category-specific capability worth verifying before commitment.
