Flexblocks vs Saber
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flexblocks
This app optimizes your day by automatically scheduling time blocks for tasks, helping you avoid procrastination and meet deadlines. It learns your best times to create a personalized schedule.
- Auto-scheduling for tasks
- Optimizes daily schedule
- Learns user's best times
- Integrates with calendar
- Helps meet deadlines
Read full descriptionHide full description
Wish you could have more time? Now you can! We save people just like you over 1 hour per day using Flexblocks! Flexblocks is an auto-scheduling app designed to optimize your day so you waste less time procrastinating. Here's how it works: When you have something to get done with a start and end date it goes in your calendar, and you're extremely likely to complete it, but tasks that have deadlines like your annoying math homework or physics lab don't, hence they go on to-do lists. The reason your math homework ends up being done right before the deadline is because you brain needs to see time set aside.. Introducing Flexblocks! Flexblocks fixes this problem by instantly scheduling timeblocks for you to complete these tasks before the deadline. Unlike any other apps, we learn what times work best for you to create the perfect schedule everytime! ------------------------------- We would love to hear feedback about the app. If you have any questions or concerns please reach out via any of the channels below: Instagram: @flexblocks Email: admin@flexblocks.app Notes: At present, all of our plans are paid because as a business we need to be able to pay the team to continue adding incredible features to improve your experience. The student plan is discounted significantly to allow all students access to this incredible software. Improvements to the auto-scheduling feature, calendar integrations, and re-occurring events are coming in the VERY near future. Current use at this stage in the development will enable us to bring these features to market much faster. We thank you for your support, Flexblocks Team ------------------------------ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://sites.google.com/flexblocks.app/flexblockshelpcenter/privacy-policy Terms and conditions: https://sites.google.com/flexblocks.app/flexblockshelpcenter/terms-and-conditions
Saber
Capture and organize your thoughts with a digital handwriting app designed for intuitive use. Features include dark mode inversion for eye comfort, advanced highlighter capabilities, and robust folder organization. Secure your notes with a dual-password system and enjoy seamless syncing across all your devices.
- Intuitive handwriting interface
- Dark mode inversion for eye comfort
- Advanced multi-line equation highlighting
- Unlimited nested folders for organization
- Dual-password note protection
- Seamless cross-device syncing
- Open-source code for transparency
Read full descriptionHide full description
Saber is the notes app built for handwriting. It's designed to be as simple and intuitive as possible, while still delivering unique features that you'll actually use. Additionally, Saber is available across all your devices, large and small, and syncs between them seamlessly. Notably, it can invert your notes when you're in dark mode. This allows you to write with white ink on a black background, which is much easier on the eyes in low-light environments like when the teacher turns off the lights in class. Images and PDFs are also inverted, so you can still use a digital printout or a textbook without the fuss. Saber uses a dual-password system to protect your notes from anyone but you, even if they have complete control over the server. You can safely store your notes on the official Saber server, another server, or even host your own! The app is completely open-source so that anyone can view the source code and see exactly what it's doing and how it handles your data. Many other note-taking apps are closed-source and proprietary, meaning that their inner workings are a mystery to the public. As someone who studies maths, highlighting multi-line equations was always a hassle with other apps, where the highlighter would change color when it overlapped with itself. Another problem I had was that in some apps, the highlighter would render on top of the text, fading it out and making it hard to read. Saber's highlighter has no such issues. It utilizes canvas compositing to render the highlighter in a way that is consistent with/better than traditional paper, where it handles overlaps and maintains color consistency. Saber has everything you need to keep your notes organized. Create folders inside folders inside folders to your heart's content with no limit on the number of nested folders. And even though a note may be buried deep within a nested folder, you can still access it easily with your most recent notes always available on the home screen. Discover a whole new way to capture and organize your thoughts with Saber. Whether you're a student, professional, or creative mind, Saber is your trusted companion for digital handwriting. Download now and let your ideas flow freely!
Screenshots
Verdict
The clearest difference is rating: Saber at 4.0 against Flexblocks's 1.0. Saber also leads on in-app purchases (none vs 3) and ads (none vs shown). Flexblocks's advantage is review sentiment (100% vs 76%). On price, update cadence and iOS requirement 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. Flexblocks sells 3 in-app purchases, starting at $3.99 per month. Saber asks for nothing beyond the download.
Saber holds the better App Store score, 4.0 against 1.0. That said, the two scores are not equally well evidenced: Saber has 21 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of Flexblocks's written reviews are positive against 76% of Saber's, so the app with the better star average is not the one people write more warmly about.
Flexblocks ships an update every 10 days, Saber fortnightly. The most recent releases landed on June 7, 2026 and September 22, 2026 respectively.
| Parameter | Flexblocks | Saber |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 4.0 (21 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 76.5% of reviews |
| Number of ratings | 1 | 21 — better |
| Update frequency | Every 10 days — better | Fortnightly |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 15 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrey Bukati | Adil Hanney |
Customer experience
Flexblocks
Saber
In-app purchases
Flexblocks
- Monthly Plan7 Days trial$3.991 Month
- Special Offer7 Days trial$11.491 Year
- Annual Plan7 Days trial$46.991 Year
Saber
No in-app purchases





