Technology Readiness Levels vs GroGuild
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Technology Readiness Levels
Quickly access definitions and descriptions for Department of Defense and NASA Technology Readiness Levels (TRLs). Understand the distinctions between different TRL stages and their supporting information.
- DoD and NASA TRL definitions
- Detailed descriptions for each TRL
- Supporting information (DoD)
- SETR Process alignment (DoD)
- Quick reference guide
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This is a quick-reference app for the Department of Defense and NASA Technology Readiness Levels (TRLs). It features definitions for both DoD and NASA! For each TRL, the app includes: *Definition *Description *Supporting information (DoD only) *SETR Process alignment (DoD only) Everyone needs a reminder now and then. What's the difference between TRL 5 and TRL 6? Is your invention at TRL 4 or at TRL 5? What's the difference between TRL 1 and TRL 2? All ThinChip Software apps are now available free of charge!
GroGuild
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Create your own plants and categories, edit existing plants and choose icons, spacing and growing conditions. The editor and import are free for everyone. With groguild Pro, export and share your own entries or the entire plant library. Edits survive app updates and appear in existing guilds. When replacing the library, a list of affected plants and guilds prevents missing entries. Two Australian plants join the catalog. Plant information panels now scroll reliably. GroGuild revolutionizes how you plan your garden. With our innovative drag & drop designer, you'll effortlessly create sustainable plant communities and discover the hidden synergies between different plant species. WHAT MAKES GROGUILD SPECIAL? GroGuild combines centuries-old permaculture wisdom with modern desktop and mobile technology. The intuitive 2D canvas makes complex ecosystem planning accessible - from hobby gardeners to professional landscape planners. KEY FEATURES: • Drag & Drop Guild Designer with an interactive 2D canvas • Grid, snap-to-grid and alignment guides for precise beds • Distance and area measurement directly on the canvas • Companion synergies and antagonist conflicts drawn as live lines • Plant database with category, spacing, sun and water needs • Plants native to North America with region and pollinator filters, a North American origin badge, bloom months and butterfly host information • Seasonal sowing and harvest calendar • Southern Hemisphere mode: sowing, bloom and harvest months shift automatically by six months • Guild templates such as Three Sisters, Fruit Tree Guild, Herb Island, Pollinator Patch and Monarch Waystation • Units in cm, m, inches and feet • PDF with layout, plant list and relationships; PNG image of the layout PDF labels and plant names follow all 18 app languages, including Japanese, Simplified and Traditional Chinese, and Korean. Bundled fonts let the first PDF or PNG export work without internet access. Pollinator Patch and Monarch Waystation are North American examples. Check site suitability and local rules before planting. Do not plant Asclepias syriaca in the EU. AVAILABLE IN 18 LANGUAGES: German, English, Spanish, French, Italian, Dutch, Polish, Portuguese, Swedish, Norwegian, Danish, Turkish, Japanese, Simplified Chinese, Traditional Chinese, Korean, Czech and Finnish - with one-tap language switch. PERFECT FOR: • Permaculture enthusiasts and hobby gardeners • Pollinator garden and native planting projects • Landscape planners and garden designers • Self-sufficient growers and sustainable farmers • Agricultural science students FREE AND PRO: The free version includes 15 plants across all categories, enough to plan the classic fruit tree guild in full. groguild Pro unlocks every plant and every guild template with a one-time purchase. No subscription. PRIVACY FIRST: All designs are stored strictly on-device. No design data, plant selections or metadata are sent to any server. Transform your garden into a productive, sustainable ecosystem with GroGuild!
Screenshots
Verdict
The clearest difference is in-app purchases: Technology Readiness Levels at none against GroGuild's 1. GroGuild's advantage is update cadence (every 3 weeks vs every 8 months) and device support (3 vs 1). On price and ads 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. GroGuild sells 1 one-off in-app purchase. Technology Readiness Levels asks for nothing beyond the download.
Technology Readiness Levels ships an update every 8 months, GroGuild every 3 weeks. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.
| Parameter | Technology Readiness Levels | GroGuild |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 8 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, Mac — better |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 83 MB |
| Age rating | 4+ | 4+ |
| Developer | Russell Shannon | Adrian Grochla |
In-app purchases
Technology Readiness Levels
No in-app purchases
GroGuild
- GroGuild Pro$3.99
Questions
Is Technology Readiness Levels free?
Is GroGuild free?
Do Technology Readiness Levels or GroGuild have ads?
Which is updated more often, Technology Readiness Levels or GroGuild?
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