Write AI vs Must
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Write AI
Enhance your writing with AI-powered tools for grammar correction, social media content creation, tone adjustment, and translation. Generate professional emails, Instagram captions, and SEO-optimized text.
- Grammar check and fix
- Social media content creation
- Tone enhancement
- Text translation
- Summarizing articles
- Professional email writing
- Instagram caption generation
- SEO content optimization
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Unleash the power of AI in your everyday writing with Write AI! Designed to cater to writers, social media enthusiasts, professionals, and anyone in need of impeccable text, our app offers a unique blend of features to elevate your writing game. Key Features: Grammar Check & Fix: No more embarrassing mistakes. Input your text, and let our AI handle the grammar, punctuation, and spelling. Be confident in your words, every time. Social Media Mastery: From catchy tweets to engaging Facebook posts, our AI crafts content that resonates. Gain followers and drive engagement with ease. Tone Enhancement: Convey emotions better. Whether you want your text to sound formal, casual, positive, or any other tone, our AI moulds it to your needs. Translation: Break language barriers. With AiWrite Pro, you can translate your text into multiple languages, ensuring your message is globally understood. Summarizing: Crunch lengthy articles or notes into concise summaries. Ideal for quick revisions or understanding the crux of vast content. Professional Email Writing: Impress your colleagues and superiors. Type in your message, even in broken language, and watch it transform into a polished email. Instagram Captions: Make every post memorable. From witty to heartfelt, find the perfect caption for your photos. SEO Generation: Rank higher on search engines. Our AI assists in creating content optimized for search engines, driving more organic traffic to your websites or blogs. And More!: We're always evolving and adding new features to ensure you have the best writing assistant in your pocket. Crafted with love for those who want their words to make an impact, AiWrite Pro is more than just a writing app – it's your AI-powered writing partner. Whether you're sending an important email, posting on social media, or crafting content for your website, make every word count. Subscriptions & Terms: Unlimited Access Subscription: - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Write AI offers a monthly subscription: "Write AI Pro Monthly". - You can subscribe for unlimited access to all features and content offered for purchase within Write AI. - GPT-4 is subject to the availability through the OpenAI API and might not be available at all time. - Subscriptions are billed monthly at the rate selected depending on the subscription plan. - Subscriptions auto-renew at the cost of the chosen package, unless canceled 24-hours in advance prior to the end of the current period. The subscription fee is charged to your iTunes account at confirmation of purchase. You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase. - See our privacy policy and terms of service: Privacy Policy: https://docs.google.com/document/d/13KmYVW0DCMMYALJ2cKb5Pg1xbR4zmedjYi1-ZQSWTIw/edit?usp=sharing Terms of Use: https://docs.google.com/document/d/1bsQq3AJSV4RonJpet4BNbbYu4lPvDrPsW7iGkSfwIFw/edit?usp=sharing We hope you enjoy the app!
Must
Transform calendar events and future dates into system alarms that ring even on Silent or Focus modes. Set one-time alarms for appointments or tasks, with options for early reminders and customizable snooze durations. Unlock advanced features like unlimited alarms and recurring options with a one-time purchase.
- Calendar events as alarms
- Alarms for any future date
- Early heads-up notifications
- Customizable snooze durations
- Unlimited alarms (Pro)
- Recurring alarms (Pro)
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Turn appointments and calendar events into alarms that ring through Silent and Focus. Choose an event from Apple Calendar, or set an alarm for any future date and time. CALENDAR EVENTS THAT RING • Browse upcoming events from Apple Calendar • Choose an event and create a separate system alarm • Add an optional early heads-up before the event • Calendar details are copied when you create the alarm; later calendar edits do not update it automatically ALARMS FOR ANY FUTURE DATE • Set a one-time alarm for an appointment, meeting, task, or deadline • Choose the date and time you need • Stop the alarm or snooze for 5 minutes • Search and review your active and past alarms FREE TO START • Keep up to two active alarms • Create manual or calendar-based one-time alarms • Add a 5-minute or 10-minute early heads-up • View local alarm activity insights MUST-RING PRO — ONE-TIME PURCHASE • Keep unlimited active alarms • Repeat daily, on weekdays, or weekly on a selected weekday • Choose custom early heads-up timing • Snooze for 10, 15, 30 minutes, or a custom duration • Explore private calendar insights for your recent schedule One-time purchase. No subscription. PRIVATE BY DESIGN Alarm titles, notes, calendar names, event details, and scheduled times stay on your device. Calendar access is used to create alarms and calculate insights locally. Anonymous product analytics may be used to improve the app, but it does not include your calendar or alarm content. No account is required. Requires iOS 26 or later. Must-Ring uses Apple’s AlarmKit. Alarm behavior depends on Alarm permission, successful scheduling, and device settings. Must-Ring is not intended for medical, emergency, or safety-critical alerting.
Screenshots
Verdict
The clearest difference is rating: Write AI at 4.4 against Must's 3.0. Write AI also leads on ratings volume (7 vs 1) and iOS requirement (16.0 vs 26.0). On price, update cadence, ads and in-app purchases 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. Write AI sells 5 in-app purchases, starting at $3.99 per 7 days and Must sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Write AI holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Write AI has 7 ratings behind it against 1, so its average is the more settled of the two.
Write AI ships an update monthly, Must every 2 months. Both last shipped on October 28, 2026.
| Parameter | Write AI | Must |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (7 ratings) — better | 3.0 (1 ratings) |
| Number of ratings | 7 — better | 1 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 15 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Eilon Krauthammer | 紫妍 连 |
Customer experience
Write AI
Must
In-app purchases
Write AI
- Write AI Pro Weekly$3.997 Days
- Write AI Pro Monthly$9.991 Month
- Write AI Pro Monthly3 Days trial$9.991 Month
- Write AI 3 Tokens$2.99
- Write AI 10 Tokens$6.99
Must
- Must-Ring Pro (Founding Offer)$4.99
- Must-Ring Pro$9.99









