GWP vs Tazrah
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GWP
This tool helps convert between metric tonnes, ODP tonnes, and CO2-equivalent tonnes for substances controlled by the Montreal Protocol. It features two modes: 'Actual Values' and 'Kigali Amendment', and supports English, French, and Spanish.
- Converts metric tonnes, ODP tonnes, and CO2-equivalent tonnes
- Includes Kigali Amendment mode
- Supports 'Actual Values' and 'Kigali Amendment' modes
- Displays substance ODP, GWP, and description
- Calculates for single component substances and refrigerant mixtures
- Available in English, French, and Spanish
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The UNEP OzonAction GWP-ODP Calculator app will help you to convert between values in metric tonnes, ODP tonnes and CO2-equivalent tonnes (or kg) of substances controlled by the Montreal Protocol and their alternatives. The updated application now includes a new Kigali Amendment mode. The app can now be used in two different modes: the regular "Actual Values" mode and the "Kigali Amendment" mode. In the Kigali Amendment mode, the global warming potential (GWP) values provided are those specified in the Kigali Amendment to the Montreal Protocol, i.e. GWP values are only assigned to controlled HFCs. In this mode the GWP values used to calculate the refrigerant blends/mixtures only include GWP contributions from components that are controlled HFCs. The user can effortlessly switch between modes. The OzonAction GWP-ODP Calculator uses standard ODP values and GWP values as specified in the text of the Montreal Protocol to make the conversions; other ozone depleting potential and global warming potential values from the recent reports from the Montreal Protocol technology and scientific expert panels as well as the Intergovernmental Panel on Climate Change (IPCC) are used when appropriate, with references to sources of all values used. The app includes new refrigerant mixtures (with ASHRAE approved refrigerant designations). The app can be viewed in English, French or Spanish. For single component substances simply select a substance from the dropdown list and enter the known value in the appropriate field (e.g. a quantity in Metric tonnes). The calculator will automatically perform the conversion between metric tonnes, ODP tonnes and/or CO2-equivalent tonnes (or kg) and display the corresponding converted values. The ODP, GWP and description of substance are also provided. For refrigerant mixtures/blends, simply select the name of the blend and enter the quantity. The calculator will display the corresponding total ODP tonnes and CO2- equivalent tonnes for that quantity of substance. The components of the mixture and their relative proportions (metric, ODP, CO2- equivalent) are also displayed. Both these types of calculations can be carried out in both the "Actual Values" mode and the "Kigali Amendment" mode. This application is designed primarily for use by Montreal Protocol National Ozone Units and other related stakeholders. The application was produced by UN Environment Programme (UNEP) OzonAction as a tool principally for developing countries to assist them in meeting their reporting and other commitments under the Protocol and is part of the OzonAction work programme under the Multilateral Fund for the Implementation of the Montreal Protocol.
Tazrah
Improve your Quranic recitation with daily practice, AI assistance, and feedback from certified instructors. Suitable for all levels, this app offers structured learning modules and engaging challenges to make your Quranic journey meaningful.
- Quran recitation review by certified instructors
- Personalized audio feedback for pronunciation
- AI-powered practice sessions
- Step-by-step learning modules
- In-app Quran challenges
- Digital Quran, prayer times, Qibla, nearby mosques, digital tasbih
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Tazrah: Baca al-Quran dengan Yakin Tazrah membantu anda memperbaiki bacaan al-Quran melalui latihan harian, sokongan AI, dan semakan bacaan oleh ustaz dan ustazah bertauliah terus melalui telefon anda. Sesuai untuk pemula, dewasa, saudara baharu, dan keluarga yang ingin belajar al-Quran secara fleksibel mengikut masa sendiri. CIRI UTAMA • Semakan Bacaan Hantar bacaan ayat al-Quran untuk disemak oleh ustaz dan ustazah bertauliah. • Maklum Balas Audio Terima pembetulan dan panduan audio untuk membantu memperbaiki sebutan, kelancaran, dan ketepatan bacaan. • Latihan AI Gunakan semakan AI sebagai latihan awal sebelum menghantar bacaan untuk disemak oleh ustaz dan ustazah bertauliah. • Modul Pembelajaran Ikuti pembelajaran al-Quran secara berperingkat untuk membantu perkembangan yang lebih konsisten. CABARAN TAZRAH Sertai Cabaran Tazrah dan jadikan perjalanan al-Quran anda lebih bermakna dan menyeronokkan. • Sertai cabaran dalam aplikasi • Uji dan tingkatkan konsistensi bacaan anda • Bersaing dengan peserta lain AKSES PEMBELAJARAN Percuma • 1 semakan AI setiap hari • Akses kepada alat latihan asas Tazrah Premium • Akses penuh kepada modul pembelajaran • Semakan AI tambahan • Sokongan pembelajaran untuk individu dan keluarga Tazrah Premium Tahunan • Termasuk semakan bacaan oleh ustaz dan ustazah bertauliah MUIB • Termasuk maklum balas audio peribadi ALAT HARIAN Tazrah turut menyediakan: • Quran Digital • Waktu Solat berdasarkan lokasi • Arah Kiblat • Masjid Berdekatan • Tasbih Digital Belajar, berlatih, sertai cabaran, dan perbaiki bacaan al-Quran anda bersama Tazrah.
Screenshots
Verdict
The clearest difference is update cadence: Tazrah at every 10 days against GWP's every 38 months. GWP's advantage is monetization model (free vs freemium) and iOS requirement (11.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
GWP ships an update every 38 months, Tazrah every 10 days. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.
| Parameter | GWP | Tazrah |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (18 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 18 — better |
| Update frequency | Every 38 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 28 MB | 340 MB |
| Age rating | 17+ | 9+ |
| Developer | UNEP | NEXTACLOUD TECHNOLOGIES SENDIRIAN BERHAD |
Customer experience
GWP
Tazrah
In-app purchases
GWP
No in-app purchases
Tazrah
No in-app purchases









