# OpusTel vs SLYFONE

The clearest difference is review sentiment: OpusTel at 80% against SLYFONE's 24%. OpusTel also leads on in-app purchases (none vs 7) and ads (none vs shown). SLYFONE's advantage is update cadence (every 6 weeks vs every 14 months) and ratings volume (789 vs 6). On price, device support and iOS requirement there is nothing between them.

Both are free to download. SLYFONE sells 7 in-app purchases, starting at $14.99 per 3 months. OpusTel asks for nothing beyond the download.

OpusTel holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: SLYFONE has 789 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 80% of OpusTel's written reviews are positive against 24% of SLYFONE's.

OpusTel ships an update every 14 months, SLYFONE every 6 weeks. The most recent releases landed on August 29, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | OpusTel | SLYFONE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/opustel/id945641896/reviews)** | [4.6 (789 ratings)](https://appshunter.io/ios/app/slyfone/id1504527810/reviews) |
| Number of ratings | 6 | **789** |
| Positive reviews | **80.0% of reviews** | 23.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 14 months | **Every 6 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 98 MB | 94 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OpusTel](https://appshunter.io/developer/945641895) | [MobileSphere, Ltd](https://appshunter.io/developer/295767902) |

## What reviewers say

### OpusTel

[App page](https://appshunter.io/ios/app/opustel/id945641896)

This app provides a real Swiss international telephone number for secure VoIP calls on iOS devices. It offers HD audio quality, free global calls between users, and call recording capabilities, all with a focus on user privacy.

**Highlights:** Real Swiss international telephone number, Secure VoIP calls, HD high-definition audio quality, Free global calls between users, Call recording, Conference calls, Automatic language selection

**In-app purchases:** none


### SLYFONE

[App page](https://appshunter.io/ios/app/slyfone/id1504527810)

Obtain a genuine US mobile number for essential verifications and communications, alongside a global eSIM for data access in over 110 countries. This app ensures privacy, facilitates international calls, and provides reliable connectivity for travel and business.

**Highlights:** Virtual US mobile number, Global eSIM for data, App and account verifications, Two-factor authentication, International calls and texts, Spam blocking, No roaming fees

**Features:** Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Three Months Plan | $14.99 | per 3 months |
| Yearly Plan | $49.99 | per year |
| eSIM | $3.00 | one-time |
| 10 Dollar Credit Bundle | $10.00 | one-time |
| 25 Dollar Credit Bundle | $25.00 | one-time |
| 50 Dollar Credit Bundle | $50.00 | one-time |
| 100 Dollar Credit Bundle | $100.00 | one-time |

**What reviewers like**

- ⭐ Excellent app
- 🙌 Saved me from a problem
- 👍 Very good

**What reviewers complain about**

- 💰 Expensive subscription
- 🔒 Unsafe app with harassment
- 🐛 Non-functioning features
- 🚫 Doesn't work as advertised
- 📞 Poor call quality

**Reported bugs**

- Account temporarily unavailable
- Texts/codes not received
- Calls not working properly
- Login/sign-up issues

**Requested features**

- Fix international prefix support
- Improve call forwarding
- Add more features like Dingtone app


## Frequently asked questions

### Is OpusTel free?

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

### Is SLYFONE free?

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

### Which has better reviews, OpusTel or SLYFONE?

OpusTel is rated higher. OpusTel averages 5.0 out of 5 from 6 ratings, while SLYFONE averages 4.6 from 789 ratings.

### Do OpusTel or SLYFONE have ads?

SLYFONE shows ads; OpusTel does not.

### Which is updated more often, OpusTel or SLYFONE?

OpusTel ships an update every 14 months, and SLYFONE every 6 weeks. Most recently, OpusTel was updated on August 29, 2026 and SLYFONE on September 23, 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.*