apps.apple.com/us/app/muntazam-habit-tracker/id6805372840

The numbers

First visit

0.214 g CO₂e

Return visit

<0.001 g CO₂e

Hosting

unknown

LCP

764 ms

CLS

0.006

TTFB

277 ms

At 10,000 views a month this page emits about 19.2 kg CO₂e a year, roughly 79 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 0%, and world-average grid intensity. How we calculate this

1. Reduce JavaScript payloadsave ~0.022 g/visit (198 kB)High impact · moderate effort

   11 scripts total 793 kB on the wire (2.96 MB decoded). Bundles this size usually carry a lot of unused code.

   Split bundles per route, tree-shake dependencies, and audit with a bundle analyzer or coverage profile. A 25% cut is a conservative target for bundles this size.

   • index~BJysNwjVFa.js634 kB
   • index~BRTBTu87nN.js73 kB
   • translations~CYWyqVsJHl.js39 kB
   • version~BNUm1OH-k3.js9.8 kB
   • ae-client-kit-core.esm~DklA9FNpxf.js8.1 kB

   WSG 3.2: Minify and remove unused codeWSG 3.3: Modularize bandwidth-heavy components
2. Optimize web fontssave ~0.018 g/visit (159 kB)Medium impact · quick fix

   5 font files total 446 kB, 1 not in WOFF2.

   Subset fonts to used glyphs, prefer one variable font over multiple weights, serve WOFF2 only, and consider system fonts for UI text.

   • SFPro.woff2415 kB
   • SFProIcons_regular.woff11 kB
   • ArabicUIText-Regular-subset.woff29.4 kB
   • PingFangTC-Regular-subset.woff28.8 kB
   • AppleSDGothicNeo-Regular-subset.woff21.3 kB

   WSG 2.11: Use optimized web typography
3. Verify your hosting energyMedium impact · moderate effort

   This host has not published renewable energy evidence with the Green Web Foundation, so its energy source is unknown.

   Choose a provider listed in the Green Web Directory, or ask your current provider to publish evidence (and a carbon.txt). This cuts the data-center share of every single page view.

   • carbon.txtNo carbon.txt found at the site root; publishing one is the lightest first step.

   WSG 4.1: Use sustainable hosting
4. Upgrade compression beyond gzipsave ~0.014 g/visit (127 kB)Advisory · quick fix

   846 kB of text ships gzip-compressed; Brotli or Zstandard would cut roughly another 15-20%, and browsers without them fall back to gzip automatically.

   Serve precompressed Brotli for static text assets (highest level, compressed at build time) and enable Brotli or zstd for dynamic responses; keep gzip only as the fallback.

   • index~BJysNwjVFa.js634 kB
   • index~BRTBTu87nN.js73 kB
   • index~CzDHPOrlII.css51 kB
   • translations~CYWyqVsJHl.js39 kB
   • version~BNUm1OH-k3.js9.8 kB

   WSG 4.3: Reduce data transfer with compression

Where the bytes are

• JavaScript793 kB · 11 req
• Fonts446 kB · 5 req
• Images113 kB · 20 req
• CSS52 kB · 2 req
• HTML29 kB · 1 req
• Data (fetch)6.0 kB · 1 req
• Data (XHR)2.6 kB · 2 req
• Other0 B · 2 req