Rainbow vs MailTime
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rainbow
Unify all your cloud storage into one accessible account. Upload large files, sync folders across different services, and back up data seamlessly. Share files easily with secure links and search across all connected clouds.
- Combine multiple cloud accounts
- Sync folders across accounts
- Backup data between accounts
- Share files with secure links
- Search across all linked clouds
- Passcode protection for data
- Drag & Drop file management
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How amazing would it be if you could combine the available storage of each account into a single account with that large storage? You then would be able to upload large files, files that do not fit in the available storage of each account... SmartCloud service: Combine your connected cloud accounts into a single account. The Rainbow app can be used to : - Connect to multi-accounts from the same cloud service - Sync two folders, even if they are located in different accounts - Backup on account to another. - Copy one account to a folder in another account - Share files with a single link from Box, Dropbox, Google Drive, MediaFire, OneDrive and SugarSync and for up to 11 days!! - Search for a file in all linked cloud accounts - Transfer files / folders from one account to a folder in another account or from one folder to another folder in the same account - Amazing graphics and UX. Drag & Drop feature Rainbow supports the following twelve cloud services: - Box - DropBox - Egnyte - Hubic - Google Drive - iDrive - MEGA - MediaFire - ShareFile - OneDrive (old SkyDrive) - OneDrive for business - Sugar Sync Furthermore, with the Rainbow app you can: - Passcode protect your data - Create and edit text files (simple text editor) - Use the camera or the photo library to take pictures - Use the camera or the video library to record video - Create folders - Rename files - Copy and delete folders - Share files over the Bluetooth device - Email files - Download files from the Internet and save me locally or on the cloud - Copy an account to a folder in any account
MailTime
This app transforms your email inbox into a streamlined, chat-like experience. It integrates multiple email accounts and uses AI to help you draft replies, proofread messages, and manage conversations efficiently. Enjoy a clutter-free inbox and communicate as easily as sending a text message.
- SMS-style email conversations
- AI-powered email replies
- Proofread, shorten, expand messages
- Group chat-like email management
- Integrates multiple email accounts
- Secure and ad-free interface
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MailTime is the easiest email inbox management app on your phone. Send and receive emails in SMS style without needing all your contacts to download the same app. MailTime simplifies your email inbox and helps declutter your daily life and business. Now supports integrating mailboxes like Gmail, Yahoo Mail, Outlook, Hotmail, and more. Download now to experience the easiest email experience! 【MailTime AI: Email Protocol-based AI Assistant】 Experience disruptive email messaging powered by generative AI - MailTime AI generates contextual email replies that are tailored to the conversation thread - Choose from "Positive" or "Negative" tones and select "Long" or "Short" reply length. Click "Generate" to receive personalized, AI-powered email drafts - Refine your message with "Proof-read", "Shorten" or "Expand" options, optimizing both AI-generated and your own text - MailTime AI Wallet*: Sign up for RewardMe to get daily FREE tokens, or Subscribe to Monthly or Yearly plans to enjoy unlimited use 【Email as easy as text】 - MailTime reformats your cluttered email threads into clean bubble conversations just like Whatsapp. Communication should be like a dialogue, not in threads! - Our smart inbox prioritizes important senders from all your newsletters, marketing emails, and other bot-generated mails in All Mail. 【Emails as group chat】 - Manage your conversations in MailTime just like a group chat - Open a group chat with all relevant email addresses and email subject - Swipe left to change your participants' status in the email group chat. Easily add, remove, or switch participants to “cc” or “bcc” for the latest message that you desire to send out 【Connect with new contacts】 - Contact anyone with their email address in MailTime, instead of phone numbers - Start a new conversation with people who are not in your contacts by writing a message-like email only using the recipients’ email address 【Support multiple email accounts and storages in one app】 - Do not need to download other email apps. MailTime integrates multiple email platforms and supports various email accounts, including Gmail, iCloud, Yahoo, Outlook, AOL, Office 365, Mail.ru, Hotmail, QQ, 163, 126, Tencent Enterprise, Google Apps Mail services - Easily attach files from Dropbox, iCloud, Google Drive, Box, and OneDrive with MailTime 【Secure and ads-free】 - Email chats encrypted by multi-layered passcodes, protecting your privacy and personal information - Unlock MailTime using Face ID/Touch ID and passwords, and enable App Password to activate two-factor authentication(2FA) for specific email address - No ads will block you from our interface “MailTime makes emails more manageable, easier to read, and quicker to respond to.” — TechCrunch "MailTime puts what we love about SMS in an email client." — LifeHacker We love emails! Click “Write to MailTime Team” or send an email to support@mailtime.com. We would love to hear from you to improve your email experience in MailTime. Website: http://mailtime.com Twitter: @mailtimeapp Facebook: @mailtimeapp Instagram: @mailtimeapp Have a Good MailTime! ======== 【Introduction of MailTime】 People don't email like they used to. Why hasn't email changed along with time? We reformat your cluttered email threads into clean bubble chats, and separate people in your inbox from all the discounts and newsletters. 【Our mission】 We are a team of mail senders and recipients tired of sending lengthy and formal emails in complicated formats. We aim to build an easy email platform that reformats email to raise productivity and efficiency, and to bring convenience to your daily life. We believe that the integration of email accounts from Gmail, Yahoo Mail, Outlook, Hotmail etc. could achieve the mission of serving various email functions in one app. We revolutionize emails into a new generation, and you will be a part of us in the journey. *Subject to Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
Rainbow and MailTime both sit at 3.6 stars, but that hides the real split: 60% of MailTime's written reviews are positive against 20% of Rainbow's. MailTime also leads on update cadence (fortnightly vs every 2 months) and ratings volume (97 vs 5). Rainbow's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price, rating, 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. Rainbow sells 9 one-off in-app purchases and MailTime sells 5 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 3.6 for Rainbow against 3.7 for MailTime. That said, the two scores are not equally well evidenced: MailTime has 97 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 20% of Rainbow's written reviews are positive against 60% of MailTime's.
Rainbow ships an update every 2 months, MailTime fortnightly. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.
| Parameter | Rainbow | MailTime |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (5 ratings) | 3.7 (97 ratings) — better |
| Positive reviews | 20.3% of reviews | 59.7% of reviews — better |
| Number of ratings | 5 | 97 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 31 MB | 121 MB |
| Age rating | 4+ | 17+ |
| Developer | i-SmartSolutions | MailTime |
Customer experience
Rainbow
MailTime
User reviews
Rainbow
From 5 App Store ratingsWhat we love
- 💡 Great concept for cloud management
- 🚀 Efficient file transferring between clouds
- 👍 Easy to use once familiar
- 👍 Exactly what users needed
- 👍 Works with multiple cloud services
Room to improve
- 🐛 Crashes frequently
- 🐛 Unstable and buggy
- 🐛 UI is unintuitive and ugly
- 🐛 Not user-friendly interface
- 🐛 Limited functionality
MailTime
From 97 App Store ratingsWhat we love
- 🚀 Fast and smooth
- 👍 Intuitive and user-friendly interface
- 💡 Innovative email-as-chat concept
- 🚀 Efficient email management
Room to improve
- 🐛 Crashes and freezes
- 🔌 Slow sync and update issues
- 🔒 Concerns about data privacy and security
- 📤 Limited email account support
Bugs and requests
Rainbow
Reported bugs
26 issues- Crashes when transferring or backing up files
- Crashes when setting up Google Drive
- Crashes when adding SkyDrive
- Signs out of all cloud services after crash
- Cannot make sense of the interface
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- Sync, backup, and file transfer impossible since last update
- List of services no longer appears
- App Support link leads to a dead end
- No obvious contact us link
- Not obvious how to subscribe within the app
- Error message when trying to contact support
- App crashes when trying to login to skydrive
- Cannot see files on Pogoplug attached drive
- Crashes on trying to connect to Pogoplug
- Password creation locks users out
- Connections to cloud services drop
- Cannot access 2 accounts with the same cloud server
- Issues signing into Box account
- Box.net login redirects to App Store
- Skydrive login page broken
- Crashes when trying to sign into Sugarsync
- App asks to sign in every time
- Skydrive login redirects to main menu and then blank screen
- Other services show as connected without logging in
- Cannot add more than two clouds
- App disconnects immediately after opening a connected cloud service
Requested features
12 requests- Hide unused cloud services
- Progress bar for transfers
- Background transfer processing
- Password protection to prevent app use
- Mac version of the app
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- Support for more cloud services (e.g., PogoPlug, Box.net)
- Ability to select and transfer entire folders
- Dark mode option
- Advanced analytics dashboard
- UI design improvements
- Ability to open and rename documents
- Text editor with copy/paste functionality
MailTime
Reported bugs
3 issues- Frequent crashes on iPhone 6 and older devices
- Inability to log in to certain email accounts
- Sync issues causing missed or delayed notifications
Requested features
4 requests- Support for more email providers (e.g., Naver, Daum)
- Ability to organize emails into folders
- Option to customize notification sounds
- Improved search and archiving functionality
In-app purchases
Rainbow
- 1 month subscription$0.99
- SmartCloud for 1 month$0.99
- Enable simultaneous transferring of files from multi accounts$1.99
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- Remove Ads$2.99
- Share files for 1 month$2.99
- Subscribe for 6 months$4.99
- SmartCloud for 1 year$6.99
- Subscribe for a year$9.99
- Share files for 1 year$27.99
MailTime
- AI Monthly Subscription$0.991 Month
- AI Yearly Subscription$4.991 Year
- One MailTime account$0.99
- 20 MailTime AI Credits$0.99
- 100 MailTime AI Credits$0.99









