# SumOne vs Eco Engineer

The clearest difference is in-app purchases: Eco Engineer at none against SumOne's 17. Eco Engineer also leads on iOS requirement (13.0 vs 16.0). On price there is nothing between them.

Both are free to download. SumOne sells 17 in-app purchases, starting at $2.99 per month. Eco Engineer asks for nothing beyond the download.

## The numbers

| Metric | SumOne | Eco Engineer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (19K ratings)](https://appshunter.io/ios/app/sumone-for-relationships/id1469506430/reviews)** | — |
| Number of ratings | **19K** | — |
| Positive reviews | 73.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | Every 6 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 255 MB | 41 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | **iPhone** | — |
| Age rating | 4+ | 17+ |
| Developer | [sandfox](https://appshunter.io/developer/376618320) | [ARES (HK) TECHNOLOGIES LIMITED](https://appshunter.io/developer/1780464045) |

## What reviewers say

### SumOne

[App page](https://appshunter.io/ios/app/sumone-for-relationships/id1469506430)

Deepen your connection with your partner through daily questions and shared experiences. Discover new insights about each other, nurture a virtual companion, and personalize your shared digital space. Track important dates and express your feelings to strengthen your bond.

**Highlights:** Daily discovery questions, Virtual companion growth (EggMon), Customizable virtual room, Send cute notes (Memos), Anniversary tracker, Emotion tracking, Home screen widgets

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription (Beta) | $2.99 | per month |
| Monthly subscription | $5.99 | per month |
| Monthly subscription | $6.99 | per month |
| Annual subscription | $29.99 | per year |
| Annual subscription | $29.99 | per year |
| Annual subscription | $79.99 | per year |
| Gem - 2500 | $1.99 | one-time |
| Gem - 5500 | $2.99 | one-time |
| New User Gem - 5500 | $3.99 | one-time |
| Gem - 9900 | $5.99 | one-time |
| Event Gem - 12900 | $7.99 | one-time |
| 썸원골드(얼리버드) | $11.99 | one-time |
| Gem - 19000 | $11.99 | one-time |
| 썸원골드 | $12.99 | one-time |
| 썸원골드(얼리버드) | $12.99 | one-time |
| 썸원골드 | $14.99 | one-time |
| 썸원골드 | $19.99 | one-time |

**What reviewers like**

- ❤️ Lovely app
- 🎨 Cute and adorable
- 💬 Helps strengthen relationships
- 📚 Interesting questions
- 🤝 Promotes communication between partners

**What reviewers complain about**

- 💰 Expensive in-app purchases
- 🐛 Frequent crashes and bugs
- 🤖 Repetitive and generic questions
- 🔒 Locked features and limited customization
- 🧭 Difficulty earning in-game currency

**Reported bugs**

- App crashes on launch
- Pebbles (in-game currency) disappearing
- Inability to open app on certain networks
- Syncing issues between partners
- Notification and timer problems

**Requested features**

- Add autocorrect feature
- Increase character limit for responses
- Introduce more ways to earn in-game currency
- Add mini-games or activities for couples
- Provide a web/desktop version of the app


### Eco Engineer

[App page](https://appshunter.io/ios/app/eco-engineer/id6474374357)

**In-app purchases:** none


## Frequently asked questions

### Is SumOne free?

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

### Is Eco Engineer free?

Eco Engineer is free to download, with no in-app purchases.

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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.*