Arca.so vs Folio Field Journal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Arca.so
Browse and organize online content to discover inspiring and empowering information. Connect with others, gain new perspectives, and find unique voices. Make the internet a personalized space for your interests.
- Browse and curate internet content
- Discover inspiring and empowering information
- Connect with other users' perspectives
- Gain new insights and find unheard voices
- Personalize your internet experience
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Arca is your portal for browsing and curating the internet. Each piece you curate teaches Arca to intuitively guide you to content that informs, empowers, and inspires. Connect with others’ minds, see through different lenses, and discover unheard voices. Make the internet feel yours.
Folio Field Journal
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The world waits to meet you. Folio is an app for the moments you didn't plan: the bird on your fence, the wildflower by the curb, the lizard on a sun-warm stoop. It's an app for noticing. NOT AN ANSWER. A KEEPSAKE. Other apps tell you what something is and disappear. Folio turns "what is this?" into "I'll remember this." Every encounter becomes a hand-painted watercolor portrait, archived in your folio with the date, the place, and the small story you choose to add. HOW IT WORKS Point your camera at a plant or animal. Folio identifies the species. A watercolor portrait — painted just for this encounter — appears moments later. The encounter is logged with an Encounter Index that marks how unusual the moment was: Common Find, Seasonal Find, Rare Find, or Fated Find. Add a Collector's Log if you want to remember more than the species name. Each entry settles into your folio. FIELD NOTES, QUIETLY TOLD Every species comes with a short, well-told Field Notes entry — the kind of thing a knowledgeable friend would tell you while standing next to you. No textbook prose. No taxonomy lectures. Just what's worth knowing. A COLLECTION THAT GROWS WITH YOUR WALKS Browse your folio as a grid of watercolor portraits, by date, or by rarity. Watch it fill in over weeks and seasons. The longer you carry it, the more it begins to feel like a record of where you've been and what you've stopped for. DESIGNED TO SHARE Each encounter generates a Field Journal card — composed like a specimen page, not a screenshot. Post it to Instagram, Xiaohongshu, or anywhere else you keep things. The encounter sentence shifts with the rarity tier — a Fated Find feels different from a Common one, and the card reflects that. FOR ANYONE WHO WALKS OUTSIDE You don't need to be a birder or a botanist. Folio is built for the city walker, the weekend hiker, the parent on a school run, the traveler with twenty minutes between meetings — anyone who has paused for something small and alive. Free to start. An optional subscription unlocks unlimited encounters and keeps every portrait in your folio for good. Step outside. Look up. The world has been waiting.
Screenshots
Verdict
The clearest difference is in-app purchases: Arca.so at none against Folio Field Journal's 2. Arca.so also leads on iOS requirement (15.1 vs 26.2). Folio Field Journal's advantage is update cadence (every 4 days vs every 10 days). On price, 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
Both are free to download. Folio Field Journal sells 2 in-app purchases, starting at $4.99 per month. Arca.so asks for nothing beyond the download.
Arca.so ships an update every 10 days, Folio Field Journal every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Arca.so | Folio Field Journal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (12 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 10 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 26.2 |
| Further details — not scored | ||
| Size | 64 MB | 195 MB |
| Age rating | 17+ | 4+ |
| Developer | somefrogs Oy | Kunlei He |
In-app purchases
Arca.so
No in-app purchases
Folio Field Journal
- folio unlimited monthly7 Days trial$4.991 Month
- folio unlimited annual7 Days trial$34.991 Year
Questions
Is Arca.so free?
Is Folio Field Journal free?
Do Arca.so or Folio Field Journal have ads?
Which is updated more often, Arca.so or Folio Field Journal?
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