Grammar Checker vs Raid
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grammar Checker
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Grammar checker app helps you to check and correct grammar, spelling, punctuation, and other writing mistakes with less effort. Our grammar check app scans your text, highlights the errors, and provides suitable suggestions to fix the error. To use this grammar checker for proofreading your write-ups, follow the below steps: • Type, paste, or upload a file from the device. • Tap on the “Check” button to proofread the text. • Choose a suitable suggestion to fix the error. • Tap on the “Resolve All” button to fix all issues at once. • Use the “Start Over” button to start a new session. Our grammar checker app uses AI technology to find grammatical errors in your write-ups. It highlights the grammar mistakes in red color and provides the right grammar suggestion to fix them. Some helpful features of this grammar app are listed below: • This app lets you upload files from the local storage of your device in .txt, .doc, .docx, and .pdf formats. • It uses AI technology to find and correct grammar, punctuation, and spelling mistakes in your content in no time. • Our grammar checker shows the number of grammar and spelling errors at the top of the result box in separate tabs. • It highlights the grammar errors in “red” and the spelling errors in “yellow” colors. • This app provides the right suggestion to correct writing errors to make your content error-free. • It counts the total number of words you have typed into the input box. • You can click on the “Copy” icon to copy and paste the grammatically correct text wherever you want at the same time. • After correcting the grammar errors, you can use its “download” feature to save the result text into your device’s local storage. • The “History” feature lets you access your previous documents without any hassle. You can further copy or download the content in the “History” section quickly and effortlessly.
Raid
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Raid turns a study session into a train ride you take with other people. Choose how long you want to focus, invite your friends with a six letter boarding code, and depart together. The journey runs on a live map, everyone watches the same countdown, and the whole crew arrives at the same station. RIDE TOGETHER Host a ride and share a boarding code, or invite friends directly from the app. Everyone sees the same route, the same clock and the same arrival. Rest stops are built into longer journeys, so a break is part of the timetable rather than a failure. TALK IN THE CABIN Every ride has a cabin chat, plus a live voice line you can join with one tap. Audio only, never recorded. CREWS AND THE WORLD BOARD Name a crew, share its code and climb a crew board that only counts rides you took together. A world board ranks every rider, and only minutes with your doors locked count. Climb the rank ladder from Passenger upward and unlock new travelcard designs. Watch live trains cross your city's map, pinch out to the whole world, and tap a train to see who is aboard. LOCK THE DOORS Pick the apps that distract you and seal them for the length of a ride. The selection is made in Apple's own picker and never leaves your iPhone. Slipping into a sealed app is always possible, but it costs the train time, and your crew sees the delay. KEEP WHAT YOU EARN Every arrival prints a ticket stub recording the route, the train, your seat and the people you rode with. Longer journeys print on rarer stock. After every sealed ride, tear open a souvenir packet and collect cards across four lines. Locomotives in the depot are unlocked by the distance you travel, never by payment. PLAN AHEAD Schedule departures with friends for later in the day or the week. Build a timetable you actually keep, and watch your streak and total distance grow. Raid is free to download. First Class and Supervision Passes are optional auto-renewable subscriptions. Focusing is easier when somebody is waiting for you at the other end. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://thera1d.com/privacy.html
Screenshots
Verdict
The clearest difference is update cadence: Raid at every 2 weeks against Grammar Checker's every 9 months. Grammar Checker's advantage is iOS requirement (13.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Grammar Checker ships an update every 9 months, Raid every 2 weeks. The most recent releases landed on October 1, 2026 and October 14, 2026 respectively.
| Parameter | Grammar Checker | Raid |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 29 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Abdul Rehman | Minmi Kim |
In-app purchases
Grammar Checker
No in-app purchases
Raid
No in-app purchases









