Forney PRO vs Spark
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Forney PRO
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Forney HD Flame Detector mobile app. Use this paid app to monitor and tune your Forney HD Flame Detector. Clear indication of flame on and flame off status. This app requires the Forney HD Flame detector hardware. This product is available by calling 800-356-7740. When a bluetooth connection is established between your iPhone or iPad and the Forney Flame detector this app indicates the presence of a flame for safety monitoring. The user is also able to view details of flame intensity across a range of frequencies in both the IR and UV spectrums. The app will display settings for flame discrimination (when multiple burners are present) and allow the user to tune set points for pick up and drop out of the safety relays. Using a high speed signal processor, allows specification of frequency windows to within 2 Hz resolution. The Forney HD Flame detector is agency approved for use in a wide range of industries. Any system faults are clearly displayed in the app for easy diagnosis by the user. The Forney HD Pro app, allows the user to modify the flame detector settings. This capability is also password protected.
Spark
Manage and launch your Ren'Py visual novels with this utility. It offers tailored engine versions, powerful save management, and tools to organize your entire library. Explore game assets, edit variables, and translate foreign titles directly within the app.
- Launch and play Ren'Py visual novels
- Select specific Ren'Py engine versions
- Manage and backup game saves
- Organize entire visual novel library
- Import novels from various file formats
- Browse game assets and edit variables
- On-device translation for foreign titles
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Spark: The Essential Tool for Managing Ren'Py Visual Novels Spark is an independent utility for organizing and launching Ren'Py visual novels. It is not affiliated with or supported by the official Ren'Py project. For any issues with this app, please contact Spark support, not the Ren'Py team. Launch and Play Your Novels with Ease Import and start your favorite Ren'Py visual novels directly in Spark. Once added, your titles are ready to launch with a tap, so you can focus on reading and playing instead of manual setup. Tailored Compatibility for Each Novel Choose from multiple Ren'Py engine versions to match your novel and improve stability: 8.x: 8.5.4, 8.5.2, 8.5.0, 8.4.1, 8.3.7, 8.3.4, 8.2.3, 8.1.3, 8.0.3 7.x: 7.8.8, 7.8.4, 7.7.3, 7.6.3, 7.5.3, 7.4.11 Per-novel configuration lets you: - Select the best Ren'Py version for each title - Fine-tune settings to improve quality of life. - Improve performance on complex or older games Note: Performance and compatibility vary by novel. Older titles or very large games may contain bugs or fail to run. Smaller devices can experience rendering issues. Some novels may not work at all, though we strive to support as many as possible. Powerful Save Management Take full control of your progress across all novels: - View all saves in one place instead of hunting through folders - Backup saves before big choices or endings so you can revisit them anytime - Restore old saves if something breaks or you want to replay a specific branch - Import saves from other devices and delete unwanted saves to keep things tidy Organize Your Entire Library Keep your Ren'Py collection clean and easy to navigate: - See all installed novels at a glance - Rename titles to match your personal library style - Manage multiple versions of the same novel, such as different language patches or updated builds Flexible Novel Import Add new novels from a variety of common formats: - Import from zip, apk, 7z, tar, or rar files - Quickly bring in titles from backups, downloads, or other devices Once imported, novels become part of your Spark library with version and save management ready to use. Ren'Py-Specific Tools and Enhancements Dig deeper into your visual novels with advanced utilities: Gallery Viewer - Browse novel assets directly inside Spark - View\Play images, videos, and music used by the game Variable Editor - View and edit game variables while playing - Skip grinding, fix bugged flags, or jump to specific routes by adjusting in-game values On-Device Translation - Translate novels using Apple’s on-device translation system - Make foreign-language titles more approachable without leaving the app - Keep translations private and fast by staying on your device Your Gateway to the Ren'Py Visual Novel Universe While Spark is not affiliated with Ren'Py, it is designed as a powerful companion for players who want full control over how they install, launch, customize, and maintain their Ren'Py visual novels in one place. Additional Licensing Information Ren'Py includes free software licensed under various terms, including the GNU Lesser General Public License. For a complete list of included software and license details, please visit the official Ren'Py website. Terms of Use https://spark.devl.ai/reference/terms/
Screenshots
Verdict
The clearest difference is price: Spark at $6.99 against Forney PRO's $299.99. Spark also leads on update cadence (every 4 weeks vs every 8 months) and chart position (#38 vs unranked). Forney PRO's advantage is in-app purchases (none vs 5) and iOS requirement (13.0 vs 15.5). On ads 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
Forney PRO costs $299.99 and Spark $6.99 up front. Spark sells 5 in-app purchases, starting at $5.99 per month. Forney PRO asks for nothing beyond the download.
Forney PRO ships an update every 8 months, Spark every 4 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.
| Parameter | Forney PRO | Spark |
|---|---|---|
| Price | $299.99 | $6.99 — better |
| Rating | — | 4.8 (223 ratings) — better |
| Positive reviews | — | 81.0% of reviews |
| Number of ratings | — | 223 — better |
| Update frequency | Every 8 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Paid |
| Best chart rank | — | #38 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.5 |
| Further details — not scored | ||
| Size | 32 MB | 696 MB |
| Age rating | 4+ | 4+ |
| Developer | Forney Corporation | Devon Lewis |
In-app purchases
Forney PRO
No in-app purchases
Spark
- Monthly Sponsor$5.991 Month
- Yearly Sponsor$19.991 Year
- Small Tip$2.99
- Medium Tip$4.99
- Large Tip$9.99









