# Subject Line — user reviews

> 20 indexed App Store user reviews of Subject Line by Worldata Infocenter, Inc., rated 4.70/5 from 6 ratings.

- Source: https://appshunter.io/ios/app/subject-line/id529276278/reviews
- App overview in markdown: https://appshunter.io/ios/app/subject-line/id529276278.md
- Rating breakdown: 5★ 5 · 4★ 0 · 3★ 1 · 2★ 0 · 1★ 0

## Newest reviews (7 of 20)

### 5/5 — Amazing tool

*2013-10-07*

I use this tool all the time for my email campaigns. I highly recommend it!

### 5/5 — Marketing Manager

*2013-10-03*

This app is great! Very helpful. I use it all the time to test my subject lines.

### 5/5 — Great app for email marketing

*2013-10-03*

I have used this app many times to help  with my client's email needs. This app has been extremely helpful tool. Highly recommend it for any email marketer

### 5/5 — Awesome app

*2012-08-05*

Awesome app!

### 5/5 — Marketing tool

*2012-05-30*

This is really useful!!!

### 5/5 — Pretty Cool

*2012-05-30*

I started using this for some campaigns and am finding it really helpful.

### 5/5 — Cool marketing tool

*2012-05-30*

Using this app to test subject lines for our corporate marketing campaigns. Suggestions are very helpful and we are seeing positive results with  response rates.

## Most critical reviews (10 lowest-rated)

### 4/5 — Great app for marketers

*2012-05-30*

When planning my company's email programs, deciding on subject lines to test is one of our most popular discussions. With this subject line app I easily paste a few ideas in and it helped us quickly decide which ones had the most potential. It's a great recourse for anyone doing corporate marketing!

### 4/5 — Very helpful app

*2012-05-30*

Adjusted my subject lines after using this app and got a better open rate - great app.

### 4/5 — Fantastic

*2012-05-30, version 1.03*

This is great! I haven't been able to find anything else that scans my subject line for deliverability issues!

### 5/5 — CEO

*2016-04-04*

Cool App

### 5/5 — Nice app

*2015-10-16*

It's a nice app.!!

### 5/5 — Great tool to get instant feedback on subject line

*2015-04-24*

Helped me skip hours of back and forth, condensing production time dramatically.

### 5/5 — Love it

*2015-04-20*

Brilliant.

### 5/5 — Great tool

*2015-02-13*

Helps me achieve my open rates.

### 5/5 — Very useful

*2014-10-30, version 1.78*

I found this useful in order to check the email's subject line before sending it. Nice to see what the recommendations come out to be.

### 5/5 — Fantastic for the email sender in all of us.

*2014-01-30*

See above.

## Most praised reviews (3 highest-rated)

### 5/5 — Great for campaigns

*2013-10-24*

I use this tool all the time when working on email marketing.

### 5/5 — Awesome app

*2013-10-07*

Use this app all the time. It's a great tool to test the subject lines of my emails. It's very inciteful and extremely user friendly. You should try it for your next campaign!

### 5/5 — Great site for business

*2013-10-07*

Very intuitive and easy to use! My go-to place when writing subject lines.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*