Savings circles · for people who run a tanda, arisan, or savings circle
Tandalo is a savings circle ledger for whoever runs a tanda, an arisan, an altın günü, or any circle where everyone puts in each round and one member receives that round. It keeps a table of who has put in, settles whose turn it is with a shake of the phone or an order fixed at the start, and turns each round into a receipt card for the group chat. It never holds or moves money; it only writes down what happened. Every draw keeps its seed, so anyone can re-run it later and see whether it lands on the same name.
With everyone in the room, shake the phone. The members who haven't had their turn yet circle a ring as name cards, speed up, slow down, and stop on this round's recipient, with a haptic tick while they spin and a different one when they stop. A single bump doesn't count as a shake, and the Draw button runs the exact same draw when shaking isn't practical.
Make receipt turns the result into a card with the circle name, the round, the recipient, how many members are recorded, the round total, the contribution, the date, and an eight-character draw fingerprint. Share receipt sends it as an image through the phone's share sheet, so it can go straight into WhatsApp or whichever chat your circle uses.
Tap Verify this draw on a receipt and the saved seed and candidate list run through the same calculation again, ending in Results match or Results don't match. The screen lists the candidates in the order they were added and counts how many draws were made for that round, so a redraw stays on record. Tandalo doesn't claim a draw can't be repeated. It claims anyone can check one.
Tanda, arisan, altın günü, pardna, susu: the name changes from country to country, but the circle works the same way. Everyone puts in the same amount each round, one member receives that round, and it keeps going until everyone has had a turn. Whoever organizes it ends up doing three things every time. They note who has put in, settle whose turn it is, and tell the group.
Tandalo does those three things on the organizer's phone. It is a ledger, not a bank. Money changes hands the way your circle already handles it, and the app only records that it happened.
The circle screen is a grid with members down the side and rounds across the top. Tap a cell and choose Full, Partial, or Not recorded yet. A partial entry takes an amount and an optional note, and a cell marked by mistake goes back to not recorded. Each round has a total along the bottom, the Members tab shows a running total per person, and a small ribbon marks who received each round.
A cell nobody has filled in simply stays gray. There is no red and no list singling anyone out. Full cells carry a check and partial ones carry ½, so the state never depends on color alone.
Closing a round asks you to confirm the recipient and then opens that round's receipt. After the last round the circle shows Circle complete.
You choose how turns work when you create a circle. With Set the order up front, the next name is always shown on the circle screen, and the Members tab lets you move people up or down while turns already received stay put. With Draw each round, you shake to draw on the day, and anyone who has already received drops out of the next draw automatically.
The History tab lists each closed round with its recipient and date, and any past receipt opens again from there. A round closed from a preset order says so on its receipt instead of showing a draw that never happened.
Creating a circle starts with a style: tanda, arisan, altın günü, or Circle for everything else. The style sets the accent color and card pattern and suggests the schedule and turn order that tradition usually follows. A tanda starts at every two weeks with a set order, an arisan at monthly with a draw each round. You can change any of it, and any style can be picked whatever language your phone uses.
Then you add a circle name, the members, the contribution, and a schedule of weekly, every two weeks, or monthly. Members are typed in by hand, so the app never asks for your contacts. The number of rounds follows the number of members, and you can set it yourself.
An altın günü keeps its ledger in grams of gold. Type in a price per gram and a reference value appears beside the gold collected so far, with a footnote giving the date of the price you entered. With no price, it just says No price entered yet.
Tandalo is a record-keeping tool. It does not hold, collect, or send money, and the gold reference value is only the grams multiplied by a price you typed in yourself. It is not a market quote or financial advice.
Turn on round reminders for a circle, pick the hour, and this phone gets a notification on the circle's own schedule. It shows the circle name and "The next round is coming up," never a member's name or an amount, because a lock screen is something other people see. Notification permission is asked only when you switch reminders on.
For the members there are note cards: three gentle messages to choose from, previewed as a card and shared through the share sheet. The card never says who hasn't been marked yet, and Tandalo never sends anything on its own.
A small home screen widget, on iPhone and Android, shows the nearest active circle's name with the days until its next round and the round number. It shows no member names and no amounts.
Member names, contribution records, and every draw are saved on this phone only. There is no account, no server, and no analytics service. The app makes no network requests, so it works the same offline. The only things that leave the phone are the receipts, note cards, and seeds you choose to share.
The first launch opens on a sample circle of six members with round 3 of 6 in progress, plus a short tour you can skip. You can run a draw there before setting up anything of your own, and delete the sample when you're done. Settings has Delete all data, which, after one confirmation, erases every circle, ledger, draw history, and saved receipt image and brings back the sample circle. It also lets you choose a light, dark, or system display mode.
No. Tandalo is a ledger. It records who put in for each round and whose turn it is, and the money moves between members however your circle already does it. There are no bank links, cards, or wallets in the app.
Every draw saves the seed it started from and the candidates in the order they were added. When you shake, the seed comes from the motion sensor readings at that moment plus the time. The receipt prints an eight-character fingerprint, and Verify this draw runs the same calculation again to show whether it lands on the same person. Redraws are kept and counted, never erased.
Yes. Pick the plain Circle style, which takes any schedule and either way of setting the order. The tanda, arisan, and altın günü styles only preset defaults for those traditions. The ledger, the draw, and the receipts work the same in every style.
No. Tandalo runs on the organizer's phone. Members see what you share with them: receipt cards and note cards arrive as images in the group chat.
An altın günü circle records contributions in grams. If you type in a price per gram, a reference value appears next to the grams collected, labeled with the date of the price you entered. Tandalo never looks up prices on its own, and the figure is for your records, not a market quote.
No. Tandalo is free, with no ads and no in-app purchases.
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