# Second Line Calling/Texting vs SkyDuo

The clearest difference is rating: SkyDuo at 4.7 against Second Line Calling/Texting's 4.2. SkyDuo also leads on update cadence (every 11 days vs every 2 months) and review sentiment (78% vs 68%). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Second Line Calling/Texting sells 8 in-app purchases, starting at $9.99 per month and SkyDuo sells 11 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

SkyDuo holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 2.2K and 2K respectively. Written reviews point the same way: 68% of Second Line Calling/Texting's written reviews are positive against 78% of SkyDuo's.

Second Line Calling/Texting ships an update every 2 months, SkyDuo every 11 days. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Second Line Calling/Texting | SkyDuo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (2.2K ratings)](https://appshunter.io/ios/app/second-line-callingtexting/id1231852034/reviews) | **[4.7 (2K ratings)](https://appshunter.io/ios/app/skyduo-video-calling-and-chat/id1574850767/reviews)** |
| Number of ratings | **2.2K** | 2K |
| Positive reviews | 67.6% of reviews | **77.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 11 MB | 109 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [BinaryPattern](https://appshunter.io/developer/874400678) | [Ningbo Juphoon System Software Co., Ltd.](https://appshunter.io/developer/792612356) |

## What reviewers say

### Second Line Calling/Texting

[App page](https://appshunter.io/ios/app/second-line-callingtexting/id1231852034)

Add a second phone number to your device for private texting and calling. Protect your personal number from spam and unwanted calls when dating, selling online, or for any project. Easily manage multiple numbers and contacts within the app.

**Highlights:** Add a second phone number, Keep personal number private, Unlimited texts and calls (premium), Create multiple numbers, Separate contacts, Burn temporary numbers, Mask caller ID

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Line | $9.99 | per month |
| Premium Number Plan | $9.99 | per month |
| Premium Number Plan Upgrade | $9.99 | per month |
| 3 Coin Pack | $2.99 | one-time |
| 8 Coin Pack | $5.99 | one-time |
| 15 Coin Pack | $9.99 | one-time |
| 25 Coin Pack | $13.99 | one-time |
| 60 Coin Pack | $27.99 | one-time |

**What reviewers like**

- 👍 Easy and convenient
- 🚀 Fast setup
- 🔒 Flexible and secure
- 💰 Good value for money
- 📱 User-friendly interface

**What reviewers complain about**

- 🐛 Occasional technical issues
- 🔍 Limited customer support
- 💸 Expensive premium plans
- 🔌 Unreliable call/text functionality

**Reported bugs**

- Dropped calls
- Failed message deliveries
- Disappearing contacts
- Billing/subscription problems

**Requested features**

- Ability to send images/videos
- More free credits/minutes
- Improved customer support channels
- Compatibility with newer OS versions


### SkyDuo

[App page](https://appshunter.io/ios/app/skyduo-video-calling-and-chat/id1574850767)

Connect with friends and family globally through free video calls and messaging. This app also provides secondary phone numbers for private calling and texting, offering a secure and cost-effective communication solution.

**Highlights:** Free video calls across devices, Private second phone numbers, Cheap international calls and texts, Fun messaging with stickers and GIFs, End-to-end encrypted calls and messages, Low data usage for calls

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Lite Weekly | $2.99 | per 7 days |
| US Number Plan Weekly | $3.99 | per 7 days |
| 1 Line Unlimited Plan Monthly | $4.99 | per month |
| US&CA Essential Plan Monthly | $4.99 | per month |
| US&CA Basic Plan Monthly | $7.99 | per month |
| US Number Plan Monthly | $7.99 | per month |
| Premium Monthly | $9.99 | per month |
| Premium Monthly | $9.99 | per month |
| Dual Phone 10000 credits | $1.99 | one-time |
| Dual Phone 25000 credits | $4.99 | one-time |
| Dual Phone 50000 credits | $9.99 | one-time |

**What reviewers like**

- 👍 Good app for Apple to Android calling
- 🚀 Duo has good quality video and allows drawing/doodling
- 👍 Wonderful video chat app
- 👍 Great video and sound quality
- 👍 Highly recommended for communication with family/friends

**What reviewers complain about**

- 🐛 App does not work, phone number does not work, app closes
- 🐛 App won't make any phone calls
- 🐛 Misleading, need to have contacts registered before use
- 🐛 Wrong app, not what was expected
- 🔋 Audio quality could be improved

**Reported bugs**

- App crashes, deletes itself, and doesn't work
- Can't choose or change password
- Payment issues, money deducted but no credit in app

**Requested features**

- Add group chat option
- Allow texting with WiFi
- Add more options like filters, screen sharing
- Add ability to call two people on one call


## Frequently asked questions

### Is Second Line Calling/Texting free?

Second Line Calling/Texting is free to download, with in-app purchases available.

### Is SkyDuo free?

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

### Which has better reviews, Second Line Calling/Texting or SkyDuo?

SkyDuo is rated higher. Second Line Calling/Texting averages 4.2 out of 5 from 2.2K ratings, while SkyDuo averages 4.7 from 2K ratings.

### Do Second Line Calling/Texting or SkyDuo have ads?

Neither Second Line Calling/Texting nor SkyDuo shows ads.

### Which is updated more often, Second Line Calling/Texting or SkyDuo?

Second Line Calling/Texting ships an update every 2 months, and SkyDuo every 11 days. Most recently, Second Line Calling/Texting was updated on October 29, 2026 and SkyDuo on October 30, 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.*