Watki vs Hear2Rise
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Watki
This app provides offline access to detailed descriptions of all OpenGL ES commands and functions from the official Khronos Group website. It's designed to help developers easily reference graphics API information, even for beginners.
- Complete OpenGL ES 3.2 command descriptions
- Information from official Khronos Group website
- Offline access
- Systematic function listing
- Search bar and index
- Landscape mode support
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Watki is an offline field guide to open graphics, compute and XR standards. Every call, built-in and type, with what it does, what it takes and where it fits, set in a quiet black-and-white reader that works without a connection. WHAT'S INSIDE 21 volumes and more than 12,000 entries, including: • Vulkan 1.4 and Vulkan SC 1.0, with extensions • OpenGL ES 2.0 to 3.2, OpenGL 4.6 core and OpenGL SC 2.0 • EGL 1.5 and WebGL 1.0 and 2.0, with extensions • OpenCL 3.0 and OpenCL C, SYCL 2020 and SPIR-V 1.6 • OpenXR 1.1, OpenVX 1.3.1, OpenVG 1.1 and ANARI 1.1 • The Slang core module • glTF 2.0, KTX 2.0, COLLADA 1.5 and NNEF 1.0.5 • Short overviews of machine learning and safety-critical work HOW IT READS • Each volume opens to its sections; each section lists its entries in groups you can jump between. • Entries show the signature, parameters, return values and the version or extension that added them. • Search across every volume at once. • Keep the entries you use most and come back to recent ones. • See how much of each volume you have read. MADE TO BE LOOKED AT A slow mist drifts behind the pages and changes with the time of day. You can thicken it, slow it, freeze it or give it a new pattern. In the darkroom you can develop any photo as a 1-bit print and save it. PRIVATE AND OFFLINE Everything ships inside the app. No account, no ads, no tracking and no data collected. SOURCES The reference text is generated from the published registries, headers and reference pages of each standard, under their licences. Full credits and licence details are in the app. Watki is an independent reader and is not affiliated with or endorsed by The Khronos Group or any other standards body. Vulkan, OpenGL ES, OpenGL SC, EGL, WebGL, OpenCL, SYCL, SPIR-V, OpenXR, OpenVX, OpenVG, ANARI, glTF, KTX, COLLADA, NNEF and Khronos are trademarks or registered trademarks of The Khronos Group Inc. OpenGL is a registered trademark of Hewlett Packard Enterprise, used under licence by Khronos. Slang is a trademark of its respective owner. All other names are the property of their owners and are used only to identify the standards described.
Hear2Rise
This app uses audio-only flashcards for learning. Dictate challenges and responses to create study decks for languages, math, and more. Features cloud syncing, sharing, and auto-play for hands-free learning.
- Audio-only flashcards
- Dictate challenges and responses
- Cloud syncing across devices
- Share decks with friends
- Auto-play with shuffle and loop
- Mastery level tracking
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Hear2Rise is an innovative flashcard App, where simplicity is King. Unlike other Apps that incorporate images and text, Hear2Rise focuses exclusively on Audio. This simple approach yields powerful results, making the tasks of creating, using, and sharing cards simple beyond compare. Want to learn Spanish? Just dictate the Spanish words and corresponding translation into the App, one after the other, using our simple UI (user interface). Already know Spanish and want to learn French? Just do the same thing, dictate the Spanish word followed by the French translation. Want to learn (or have your child learn) the times table? Again, just dictate your “Challenge” and the corresponding “Response”, and that’s it! You could literally create 20 cards in less than a minute! Once created, your deck is synced to the cloud, making your library available on multiple devices; you can even share your deck with friends. When doing mundane activities like taking a walk or riding a train, you can use our auto-play feature to learn your deck; you can set it to shuffle, continuously loop, and repeat each card multiple times before proceeding. Just set your preferences, press go, and let the learning begin! When reviewing cards one by one, you can mark your mastery of each card as strong, weak, or in between, and then filter your playback by its’ marked mastery level. Each card has a Challenge and associated Response. The application of this is endless. Some examples of decks you could easily create are: • Take a study guide and record the question (Challenge) and the answer (Response). Then play it back to master them. • Learn technical terms • Learn languages • Learn math facts and formulas • Store trivia cards • Memorize theater lines (via Series Mode) • Memorize biology processes like the Krebs Cycle (via Series Mode) • Memorize case law for law school • Memorize chemical equations If you can hear it, you can learn it!
Screenshots
Verdict
The clearest difference is rating: Hear2Rise at 4.0 against Watki's 3.0. Hear2Rise also leads on update cadence (every 2 months vs every 134 months) and iOS requirement (13 vs 18.0). Watki's advantage is review sentiment (67% vs 50%). On price, ratings volume, 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. Neither carries in-app purchases, so what you see is what you pay.
Hear2Rise holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews complicate that: 67% of Watki's written reviews are positive against 50% of Hear2Rise's, so the app with the better star average is not the one people write more warmly about.
Watki ships an update every 134 months, Hear2Rise every 2 months. The most recent releases landed on November 11, 2026 and November 2, 2026 respectively.
| Parameter | Watki | Hear2Rise |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (3 ratings) | 4.0 (3 ratings) — better |
| Positive reviews | 66.7% of reviews — better | 50.0% of reviews |
| Number of ratings | 3 | 3 |
| Update frequency | Every 134 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 13 — better |
| Further details — not scored | ||
| Size | 7 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Saumya Lahera | HIPOINT INC |
Customer experience
Watki
Hear2Rise
In-app purchases
Watki
No in-app purchases
Hear2Rise
No in-app purchases









