# acmqueue vs GreenScore!

The clearest difference is review sentiment: GreenScore! at 100% against acmqueue's 9%. GreenScore! also leads on rating (5.0 vs 1.6) and in-app purchases (none vs 23). acmqueue's advantage is iOS requirement (11.0 vs 15.1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. acmqueue sells 23 in-app purchases, starting at $19.99 per year. GreenScore! asks for nothing beyond the download.

GreenScore! holds the better App Store score, 5.0 against 1.6. Both are backed by a comparable volume of ratings — 8 and 10 respectively. Written reviews point the same way: 9% of acmqueue's written reviews are positive against 100% of GreenScore!'s.

acmqueue ships an update every 11 months, GreenScore! every 3 months. Both last shipped on October 2, 2026.

## The numbers

| Metric | acmqueue | GreenScore! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (8 ratings)](https://appshunter.io/ios/app/acmqueue/id1035354478/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/greenscore/id6743688819/reviews)** |
| Number of ratings | 8 | **10** |
| Positive reviews | 9.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 months** |
| Monetization | Freemium | **Free** |
| Size | 78 MB | 30 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Association for Computing Machinery](https://appshunter.io/developer/405041865) | [CS For Climate](https://appshunter.io/developer/1804001555) |

## What reviewers say

### acmqueue

[App page](https://appshunter.io/ios/app/acmqueue/id1035354478)

This publication offers in-depth technical articles and case studies for software engineers, focusing on emerging technologies and challenges. It provides critical insights to guide better engineering and design choices, keeping practitioners informed about the future of the field.

**Highlights:** In-depth technical articles, Case studies on emerging technologies, Focus on future challenges, Guidance for engineering and design, Bimonthly issues, Content for practitioners

**Features:** macOS Compatibility

**In-app purchases (23)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $19.99 | per year |
| September/October 2015 | $6.99 | one-time |
| November/December 2015 | $6.99 | one-time |
| January/February 2016 | $6.99 | one-time |
| May/June 2016 | $6.99 | one-time |
| September/October 2016 | $6.99 | one-time |
| November/December 2016 | $6.99 | one-time |
| March/April 2018 | $6.99 | one-time |
| November/December 2019 | $6.99 | one-time |
| September/October 2023 | $6.99 | one-time |
| November/December 2023 | $6.99 | one-time |
| January/February 2024 | $6.99 | one-time |
| March/April 2024 | $6.99 | one-time |
| November/December 2025 | $6.99 | one-time |
| January/February 2026 | $6.99 | one-time |
| September/October 2025 | $6.99 | one-time |
| July/August 2025 | $6.99 | one-time |
| May/June 2025 | $6.99 | one-time |
| March/April 2025 | $6.99 | one-time |
| January/February 2025 | $6.99 | one-time |
| November/December 2024 | $6.99 | one-time |
| July/August 2024 | $6.99 | one-time |
| May/June 2024 | $6.99 | one-time |


### GreenScore!

[App page](https://appshunter.io/ios/app/greenscore/id6743688819)

This app helps you live more sustainably by tracking eco-friendly actions and their impact on CO₂ reduction. Earn points, set goals, and compete with friends to build lasting green habits.

**Highlights:** Log eco-friendly actions, Track CO₂ savings, Set daily goals, Compete with friends, Progress tracking, Social inspiration

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is acmqueue free?

acmqueue is free to download, with in-app purchases available.

### Is GreenScore! free?

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

### Which has better reviews, acmqueue or GreenScore!?

GreenScore! is rated higher. acmqueue averages 1.6 out of 5 from 8 ratings, while GreenScore! averages 5.0 from 10 ratings.

### Do acmqueue or GreenScore! have ads?

Neither acmqueue nor GreenScore! shows ads.

### Which is updated more often, acmqueue or GreenScore!?

acmqueue ships an update every 11 months, and GreenScore! every 3 months. Most recently, acmqueue was updated on October 2, 2026 and GreenScore! on October 2, 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.*